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SKU 2175164  UPC 0175243925271

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Technical Specifications for IC693PCM300

ManufacturerGE Fanuc
SeriesSeries 90-30
Part NumberIC693PCM300
Product TypeProgrammable Coprocessor Module (PCM)
Serial Ports2
CCM OperationSupported
ASCII/BASIC Module OperationSupported
Hot-SwappingNot Supported
MegaBasic Interface FunctionsSupported
Compatible DevicesSeries 90-30 PLCs

Product Description

IC693PCM300 Programmable Coprocessor module is manufactured by GE Fanuc and is rated as a high-performance Coprocessor for the 90-30 Modular CPUs. Note that this type of module does not work with 311, 313, or 323 CPU models. It supports C programming and MegaBasic programming languages. A free program for this module is available and can be downloaded at the GE Fanuc site. This IC693PCM300 PCM is available in 3 versions: IC693PCM300, IC693PCM301 and IC693PCM302.  The modules are designed to communicate with barcode readers, printers, scales, CRTs, programming terminals and RTU master devices to mention just but a few.

During installation, The PCM is only installable in the CPU base plate with exception of slot 1 which should contain a CPU module. As stated earlier, this PCM is not compatible with embedded CPUs versions 311. 131 or 323LED indicators normally stay on to indicate that the module is working as expected. LED US1 flashes to communicate activity in Port 1 and LED US2 also flashes to indicate activity on Port 2. When there is no activity at all, both LEDs remain OFF. It’s important to mention that users can further custom configure the function of the LEDs to suit their needs. For backup the RAM memory, a Lithium battery is installed on the inside of the PCM faceplate. For shipment purposes, the battery is disconnected and should be connected before installation of the module. When the PCM is stored for a prolonged time duration, it’s prudent to disconnect the battery unless you want to preserve the program saved in the RAM.

GE Fanuc Automation manufactures the IC693PCM300 module as a Programmable Coprocessor Module (PCM). It is a solid-state microcomputer unit that is designed for use as a coprocessor in the GE Fanuc Series 90-30 PLCs. Based on the applications handled by the PLC, this PCM can serve as a ASCII/BASIC Module (ABM) or as a Communications Coprocessor Module (CCM). This unit features 2 serial ports which are used as connection points for the CCM function or for running MegaBasic applications. It is simple and straightforward to install the GE Fanuc IC693PCM300 Programmable Coprocessor Module because it occupies only one slot in the Series 90-30 baseplate. However, it is essential to take precaution because it does not support hot-swapping.

Devices such as process controllers, industrial computers, and peripheral monitors communicate with the GE Fanuc Series 90-30 PLC through the IC693PCM300 Programmable Coprocessor Module, which acts as the communication gateway or interface. Various MegaBasic operator interface functionalities like the acquisition of data, retrieval and storage of data, and computing in real-time can be configured, edited, and adapted for monitoring as well as for the control of various machinery systems and application processes through the IC693PCM300 Programmable Coprocessor Module. After every power interruption, the user memory is maintained through the internal lithium battery that comes with the module. It has 3 status LED indicators, including the “OK” LED for indicating the status of the module alongside 2 user-configurable LED indicators labelled “User 1” and “User 2.” The “OK” LED turns on when the module is working normally, it turns off when it is not working, and it flashes during the power-up diagnosis.

Technical Information



Troubleshooting IC693PCM300

Troubleshooting information is available on IC693PCM300's website page; it also includes a datasheet user-manual and a wiring diagram.  


Repair your IC693PCM300

PDF Supply can repair your IC693PCM300 in 3-5 business days. And PDF Supply stands by all of its repairs with a 1 year customer satisfaction warranty.


PLC90/30 Debugging a PCM Task Using TERMF Software


Debugging a PCM Task using TERMF Software


PCM Support Software (TERMF), revision 1.00 or later, is required for terminal emulation and file transfer between the PC and PCM. (Series 90-30 PCM model IC693PCM300, IC693PCM301, IC693PCM311)

PCM firmware version 3.00 does not include a runtime debugger. The best debug method currently available is to use printf statements to trace program execution and display program data. Applications which use both PCM serial ports for communication can log execution trace data to a PCM file or named memory module.

Series 90-70 PCM applications can log trace data to a reserved memory block in VME dual port memory. A second PCM can be used to read the data in VME master mode. When an application task locks up, the PCM task state dump facility can be used to diagnose the cause. For more information on this topic, see "Dumping PCM task state information" in GFK-0771A chapter 7, Multitasking.

Some developers of PCM C applications use hardware debuggers. See "Debugging Multiple Tasks" in chapter 7, Multitasking, for more information on hardware debuggers.


PLC90-30 Running a PCM Task Using TERMF Software

PCM Support Software (TERMF), revision 1.00 or later, is required for terminal emulation and file transfer between the PC and PCM. (Series 90-30 PCM model IC693PCM300, IC693PCM301, IC693PCM311)

The PCM R (Run) command is used to execute an .EXE file as a PCM task.

At the PCM prompt, type: R HELLO.EXE.

The file extension ".EXE" is required by the PCM command interpreter. When the program is executed, TERMF will display its output:

Hello, world!

Running as task of hex under VTOS version 3.00.

The Run command can also be used to load PCM programs from your PC. If the specified .EXE file has not been stored to the PCM, the command interpreter will ask TERMF to look in the current PC directory. If the file is found there, it will be loaded and then run.


Customer Questions and Answers

  • Question:  What is an IC693PCM300?  Answer:  The IC693PCM300 is a Programmable Coprocessor module from the GE Fanuc Series 90-30. This module is a high performance microcomputer designed to perform coprocessor functions in a Series 90 PLC system. It combines the function of the Communications Module (CCM) and the ASCII/BASIC Module (ABM) (both used on the Series Six PLC) into a single module with significantly greater capacity and performance than that of the ASCII/BASIC module. 
  • Question:  The configuration of this module can be to function as what?  Answer:  The configuration of IC693PCM300 can be to function as the following: one or two independent CCM ports, one CCM port and one MegaBasic application using one serial port, or one MegaBasic application using one or both serial ports.
  • Question:  Dual tasking does what in the IC693PCM300?   Answer:  It allows the PCM to run a MegaBasic program and support a CCM communications channel at the same time. 
  • Question:  All of the IC693PCM300's memory is supported by what?   Answer:  It is supported by a long-life lithium battery, located on the module.
  • Question:  How many slots does the IC693PCM300 occupy?   Answer:  Each IC693PCM300 occupies a single slot in a Series 90 rack. 
  • Question:  What should I do if my IC693PCM300 is not working properly?   Answer:  Your product may need repair

For more information on the IC693PCM300 Programmable Coprocessor Module of the GE 90-30 Series, please see the Datasheet Manual.


Product History





Upgrade Kit

New Features

Problems Resolved






  • WAIT Mode PCM Reset COMMREQs
  • PCM Get_Date service returns invalid year briefly at midnight on January 1, 2000






  • Disabling Time Of Day Clock Synchronization
  • Masking Serial Port Errors
  • Backplane Message Timeout
  • VTOS Time Slice Task Rotation may Stop






  • CE Mark approval







  • User Manual removed from shipping container








  • PLC Reference Table Access by CCM
  • CCM Target ID Check Incompatible with Previous Versions
  • CCM COMMREQ Fails with %AI or %AQ Status Word
  • CCM Slave May Begin to EOT All Incoming Headers







  • Critical Section Functions of the VTOS Operating System
  • MegaBasic SYSLINK Error with Default String Dimensions Disabled







  • Controlling PCM LEDs from MegaBasic
  • CCM Q/N Enquiry
  • Multidrop Enquiry


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