CAC CS7X

Quick Links to Information Below

• CS7X Single Solution
• CAC CS7X Applications
• CS7X Features
• CAC CS7X Controller Area Network (CAN)
• CAC CS7X Scalability / Distributed I/O
• Connectivity of the CAC CS7X
• Configurability of the CAC CS7X
• Summary of the CAC CS7X
• Hazardous Area Certifications of the CAC CS7X
• Specifications of the CAC CS7X
• Input/Output Module Specifications

PDF Documents

• CS7X Control System
• CS7X Control System - Spanish Version

eP's CAC CS7X™ control system is an Internet ready, modular, and scalable system designed to provide real time process control and monitoring of oil and gas production facilities. An integral web server supports direct viewing of process data using off-the-shelf browsers such as Internet Explorer or Netscape®. A flash file system supports FTP file transfer of system configuration and HTML files.

CS7X Single Solution

eP’s engineering team has taken the best functional characteristics from the most used industrial control systems in industry today and combined them into one versatile state-of-the-art control system, the CS7X.

CS7X Distributed Control System (DCS) Functions

• Distributed I/O
• Capable of handling a large number of I/O
• Fast I/O scan rates
• Communication between the CPU and I/O modules over a redundant network
• Scaleable
• System configuration
  • Flat
  • Hierarchal
  • Flexible, easy to add future hardware and functionality
• Open system
• Redundant CPUs
• Built-in Internet capabilities
• Report by exception

CS7X Remote Terminal Unit (RTU) Functions

• Standard I/O monitoring and control
• Operates in environmentally harsh locations
• Data-logging
• Historical trending
• Variety of communication links: radio, hardwire, fiber optic, etc.
• User defined text base programming
• PID control logic
• Local control display
• Flow calculations

CS7X Programmable Logic Controller (PLC) Functions

• Ladder logic programming
• Fail-safe shutdown sequencing

The core of the CS7X system is an event driven database designed for autonomous local control. The CS7X system architecture is based on a 32-bit CPU, named Phoebus Control Module (PCM), and a highly reliable, redundant serial bus utilizing controller area network (CAN) technology. The system utilizes state-of-the-art web technology for human machine interface (HMI), local/remote control, maintenance and routing.

Supported applications include valve and motor control, AGA3/AGA8 gas flow calculations, continuous loop PID control, and emergency shutdown capabilities. Redundant processors, hot-swappable components, global database architecture and multiple communication channels achieve high availability of the unit. I/O modules are available in either a 6U rack or DIN rail mount configuration. It can be implemented with one or two PCM(s) in a hot-standby configuration.

The CS7X system can be configured to provide redundancy at the PCM, power supply, and I/O (control) level for applications that require high levels of system reliability. The CS7X system architecture permits redundancy to be implemented for each segregated process node allowing critical processes to be redundant. Non-critical processes can use the unit in a non-redundant mode to optimize overall system costs.

CAC CS7X Applications

The CS7X system is easy to configure and flexible enough to adapt to any application. Built-in ready-to-go applications that do not require extra programming are provided by the unit. Each of these applications are field-proven and based on actual installation needs.

• High frequency data-logger; the CS7X system collects and stores data and makes it available to SCADA or other polling systems
• CAC Automatic Control Logic™ (ACL) software module; provides the ability to program the unit for those situations where applications require specifications different from the available firmware, supports up to 64 procedures that can perform various tasks and functions, and complies with IEC 1131-3 standards
• LLIP; ladder logic
• PID; up to 12 control loops per controller
• Local control display; up to four per system can be configured to display process data with a variable scroll rate
• Accumulator; up to ten per system
• Data concentrator; the CS7X system can scan other devices in the area using industry standard Modbus® protocol and include the scanned data in its database
• Gas flow calculations; up to eight AGA calculations per PCM are included in the CS7X system

CS7X Features

• Low power requirements make the CS7X suitable for solar power installation
• Event driven operation minimizes processor utilization time and improves response time to initiate an action
• Remote configurability
• CAN technology
• Highly scalable
• Hot back-up for processor and I/Os
• Built-in applications
• Open connectivity
• Multiple solution capability

CAC CS7X Controller Area Network (CAN)

CAN technology was developed for mission critical applications. In the CS7X system, it provides highly secure and reliable communications between the PCM and the controller area network operations node (CANON) module I/O sub system. It offers high-speed communication rates up to 1-Mb per second. In addition, the error confinement and detection features make it more reliable in noise critical environments.

CAN is used for communications between PCM(s) and I/O boards within a local module. Adding additional I/O is simply a matter of plugging in another I/O module. The personality card of the added I/O module communicates with the PCM and becomes an active module with its own address and configuration.

In a hierarchical system, the CAN interface to each CANON module and sub-level PCM is global across the system allowing data sharing with fast response times. Each CANON module has a unique address and data structure allowing for hot replacement and auto configuration for field replaced or new modules. CANON modules can be packaged either for 19” rack mount on 6U cards or DIN rail mount.

Each CANON module consists of a termination board, a personality card, and a brain board. The termination and brain boards are common to all I/O types. The personality card is I/O specific for each type of module (i.e. Ain, Aout, Din, Dout).

Standard features of CANON modules are:

• Redundant CAN ports on all modules
• Hot pluggable on CAN network
• Auto configuration of new or field replaced modules and synchronization into the system
• Time tagged data stamping to 2-mSec
• Time synchronization (system wide) to 1-mSec resolution for clock synchronization
• Event driven communications to PCM, continuous I/O polling is not required
• Change of status reporting to PCM, updates change of status within 1-mSec

CAC CS7X Scalability / Distributed I/O

The personality card of the added I/O module communicates with the PCM and becomes an active module with its own address and configuration. The I/O can be expanded to over 2000 in a single installation.

In a hierarchical system composed of a master unit and one or more slave units, CAN is utilized to link the slave units back to the master permitting functional isolation so that slave modules can be dedicated to critical applications. This assures that the control intelligence is distributed in the slave unit or “application modules” where the operation and control decisions need to be made.

Connectivity of the CAC CS7X

When a CS7X system is used in an installation, it can be the focal point for all data coming from a well pad, facility, or field. With its pass-through capabilities, all controllers can feed data to the system and it then becomes the remote source for all the data coming from the well pad, facility, or field.

The CS7X system has several connectivity options and is fully web enabled. All common protocols are supported including TCP/IP, FTP, and PPP. Several communication ports are provided for connecting external devices.

The CS7X system supports a wide range of protocols and connections such as:

• 10 BaseT Ethernet
• Modbus and Modbus/TCP host protocols
• RS-232 and RS-485 serial communications
• TCP/IP networking via serial port PPP protocol
• CS7X system includes an embedded web server which permits connection by most popular browsers
• Dual controller area network
• Multiple hosts

Configurability of the CAC CS7X

The CS7X system can be configured to act as a Modbus master or slave simultaneously including Modbus over TCP/IP.

• One each 10-Mbps Ethernet port
• Two each configurable RS-232/RS-485 and two each RS-232 serial ports

In addition to configuring the external devices for data retrieval and manipulation by the CS7X system, communication to the external devices can be configured as a “data concentrator”. This allows the system to be used as a data router for multiple devices, eliminating the need for additional communication paths from a host to each device.

Graphic user interface (GUI) pages, in Flash™ format, permit dynamic data to be accessed and changed.

• Graphic displays illustrating the control process can be built using standard Windows® software
• Dynamic data incorporated in the graphic display can be easily linked to the controller database
• Graphic displays can be viewed using a standard Internet browser

Customized Flash pages can be developed to meet specifications by eP’s engineering staff or by the customer using Macromedia’s Flash program.

The combination of Flash and the CS7X system’s built-in web server provides remote configurability.

Summary of the CAC CS7X

The CS7X is a versatile control system designed to handle any control requirements. The monitoring and control needs of new industrial facilities can be implemented cost effectively and efficiently using the state-of-the-art capabilities of the CS7X. The CS7X can be configured to replace existing RTUs and PLCs, providing the end user with a more reliable, easier to control system.

Hazardous Area Certifications

Factory Mutual and SIRA have certified the CS7X system to operate in Class I, Division 2, hazardous area locations.

The CS7X is designed to operate in harsh environmental conditions where low power requirements are imperative. This allows the control system to be used in virtually any remote location or plant environment. Due to its low power requirements and scalability, remote locations utilizing solar power are ideal applications for the CS7X.

Specifications of the CAC CS7X

Phoebus PCM

Input/Output Module Specifications

Field Input/Output		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Number of Inputs or Outputs	32 per node, 64 per module
	32 per module
	16 per node, 32 per module
	16 per module
	8 per node, 16 per module
	8 per module
Input Type	32-curr., 32-Volt, 16-RTD, 28 thermocouple, & 1 cold junction temp.
	16-curr., 16-Volt, 8-RTD, 14 thermocouple, & 1 cold junction temp.
Output Type	Up to 2-Amps continuous, 1-mA leakage open circuit
	0- to 25-mA, isolated and floating
	0- to 5-V, single-ended, ground referenced, 1-KOhm impedance
Input Contact Type	Mechanical contacts or open-collector transistor switch, dry contact type
Output Contact Type	Form “A” solid-state switch dry contact
Input Voltage Range	Current: 0- to 25-mA, Voltage: 0- to 5-V, RTD: 100-Ohm to 1-KOhm, 0.385-Ohms/ºC 3-wire type, all thermocouple types supported, loop power is current limited
Output Voltage Range	Open: 60-Vdc max. circ. working volt., closed: 1-V drop across output
Wetting	Nominal 12- to 24-Vdc per system configuration
Open Circuit Voltage	Open circuit indicates “OFF”/0
Closed Circuit Current	3-mA controlled constant current, closed circuit indicates “ON”/1
Protection	Complies with C37-90.1 (IEEE 472)
Common Mode Rejection	Nominal 100-dB
Isolation	3750 VRMS optical isolation
Field Load and Contact Operation Sensing	Open output switch: leakage curr. of 1-mA through optical coupler allows sensing load presence; Closed output switch: sense voltage shorted out and closed contact state is sensed
Voltage Drop in Loop	5-Vdc
Current Output	4- to 20-mA nominal
Offset Zeroing	0 produces 4-mA ±1 count self-calibrated
Gain Error	4095 ± 5 counts produces 24 mA with no adjustments
CPU		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Microcontroller	Siemens C505C 8-bit processor
Processor Speed	Crystal frequency 16-MHz
Watchdog Timer	Internal
Memory Resources	288-K Flash, 8-K SRAM
	128-Bytes EEPROM
Physical Form	6U rack mount
	DIN rail mount
Points per Module	64 points on 2 nodes
	32 points on 2 nodes
	32 points on 1 node
	16 points on 2 nodes
	16 points on 1 node
	8 points on 1 node
Terminations	Mass termination cable
	Screw terminal
Power Consumption (per node)	10- to 32-Vdc nominal 0.54-Watts
	10- to 32-Vdc nominal 1.2-Watts
Loop Power (per node)	160-mA max.
	192-mA max.
	320-mA max. (all channels at 20-mA)
	640-mA max. (all channels at 20-mA)
Dimensions	Euro 6U height slides into 10.5”x19” rack chassis, 1.5” W
	6.5”L x 3.3”W x 2.8”H
LED Status Indicators	Input status one per unit
		64	32
	Display of desired logic and current output state for each channel
	Comm. channel, I/O module PCM activity, & diagnostic/fault indication
Environmental		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Oper./Storage Temp.	-40º to +85ºC (-40º to +185ºF)
Humidity	100% non-condensing
Conformal Coating	Standard
Communications		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Synchronization	PCM sends marker message once-per-second which synchronizes I/O modules to the same 1-ms mark
Dual CAN Comm.	Two CAN network channels are accessible to the I/O module
User Configuration		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Accessibility	All user configurable parameters specified are accessible via CAN communications and are accessible from the host level
Debounce	User selects how many contiguous samples must agree before recognition of change
COS Report	User selects which edge of COS produces CAN message
Accumulator Count	User selects which edge produces an accumulator count
Accumulator Report	User selects a pre-scale value and a modulus
Signal Processing		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Sampling Rate	Digital or analog inputs are sampled each 1-ms
Resolution	24-bit
	12-bit
Input Filtering	60-Hz notch @ 7.5 samples/second
Input Contact Debounce	Configurable on per point basis, can set up to 250-ms
Input Contact Extraneous Transitions	Debounce characteristic is user configurable per point, defines number of contiguous samples that must agree before new state of input accepted
Debounce Conf. Status Signals	Up to 250-ms can be set for very unstable sources
Debounce Upper Freq. Cut-Off	When conf. with zero debounce max. rate-per-point is 250-Hz, 50% duty cycle
Change of State (COS) Reporting	User configurable for reporting change immediately for:
	OFF to ON; ON to OFF, BOTH, NEITHER
Accumulator - 16-bit, 24-bit with Pre-scale	Each point user configurable for counting input changes:
	Max. rate of 250-Hz
	OFF to ON; ON to OFF; BOTH; NEITHER
Accumulator Report	Each accumulator has conf. pre-scale & modulus values
Accumulator Pre-scale	A configurable pre-scale value allows for dividing the raw counts by 1 to 256 before they appear in the accumulator
Latched Output	Maintains the last commanded status while power is applied
	When power is interrupted & returned, module ladder logic can be conf. for returning to last or a pre-defined default state
Retentive Output	Output state is retained/reset as configured in module fail sequence logic when power is lost
Pulse Output	If not conf. for hardware SBE, each point is conf. for activation between 10- to 655,350-ms
Duty Cycle Output (PWM)	Each point is conf. for activation in repeating cycles & duration from 10- to 10,000-ms
Output Update Rate	All outputs are updated every 10-ms
Report Processing		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Report by Exception	Data reported when input exceeds per point conf. dead band
Report on High High, High, Low, & Low Low	Exception reports are generated when crossing any of these four thresholds
Periodic Report	Data reported on min. interval conf. by user regardless of data change
Rate Processing		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Rate Report	With the accumulator report, time between pulses & number of pulses-per-second are each reported
Alarm Report Accumulator Rate Maximum	Maximum frequency or minimum period
Alarm Report Accumulator Rate Minimum	Minimum frequency or maximum period
Module Failsafe Logic		Digital Input		Digital Output		Analog Input		Analog Output
		DIM1-6U	DIM1-D	DOM1-6U	DOM1-D	AIM1-6U	AIM1-D	AOM1-6U	AOM1-D
Control Sequence on Communications Failure	DOM loss of comm. less than 14 sec., then alarm & pre-programmed shutdown