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SKU 2170456  UPC 0522020672147

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Product Description


General: The IC693CPU341 module, a member of the GE Fanuc 90-30 Series, is a single slot CPU module which is equipped with 5 baseplates. It contains 4 remote and/or expansion baseplates in addition to the 1 CPU baseplate. It is equipped with an 80C188XL processor.

Power: It runs at 20 MHz and requires a load of 490 milliamps from the +5 VDC rated power supply.  The module operates at an ambient temperature range of 0 to 60 degrees Celsius (or 32 to 140 degrees Fahrenheit).

Memory: This CPU’s typical can rate is 0.3 milliseconds per 1K of logic (also known as Boolean contacts).  With a maximum user program memory of 80K bytes, the IC693CPU341 has a register memory (%R) of 9999 words; discrete global memory (%G) of 1280 bits, internal coils (%M) of 1024 bits, output (temporary) coils (%T) of 256 bits, and system status references (%S) of 128 bits (with %S, %SA, %SB, %SC having 32 bits each).  

I/O: Analog inputs (%AI) and outputs (%AQ) is 1024 and 256 words respectively.  The discrete input (%I) and output (%Q) are 512 each. It has 16 words (%SR) system registers which are used for reference table viewing only and cannot be referenced in user logic program.

Specific: This CPU has a singular built-in serial port, which requires a connector to the PLC power supply used in the system. The port supports SNP/SNP-X slave protocols.  The IC693CPU341 has PCM/CCM compatibility, although, it does require a CMM module in order to support SNP/SNP-x master, CCM, or RTU slave support. It also requires a PCM module to support RTU master.

LAN: IC693CPU341 has a Local Area Network (LAN) installed. This feature allows the CUP to support a variety of option modules, such as FIP, Profibut, multidrop, Ethernet, GBC, GMC and GCM+ option modules.  Its early versions have RAM and optional EPROM or EEPROM for memory storage. New versions, starting with hardware version IC693CPU341-J and firmware Release 4.61, only supports RAM and optional Flash for additional memory needs.

Technical Specifications


Processor Speed

20 MHz

I/O Points


Register Memory

19.9 KBytes

Floating Point Math


16 BIT System





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Technical Information


CPU341 Catalog Number IC693CPU341


CPU Type

Single slot CPU module






Total Baseplates per System

5 (1 CPU baseplate + 4 expansion and/or remote)

Load Required from Power Supply

490 milliamps from +5 VDC supply

Processor Speed

20 MegaHertz

Processor Type


Operating Temperature

0 to 60 degrees C (32 to 140 degrees F) ambient

Typical Scan Rate

0.3 milliseconds per 1K of logic (boolean contacts)

User Program Memory (maximum)

80K Bytes

Discrete Input Points - %I

Discrete Output Points - %Q



Discrete Global Memory - %G

1280 bits

Internal Coils - %M

1024 bits

Output (Temporary) Coils - %T

256 bits

System Status References - %S

128 bits (%S, %SA, %SB, %SC - 32 bits each)

Register Memory - %R

9999 words

Analog Inputs - %AI

1024 words

Analog Outputs - %AQ

256 words

System Registers (for reference table viewing only; cannot be referenced in user logic program)

16 words (%SR)



Shift Registers


Built-in Ports

1 (uses connector on PLC power supply). Supports SNP/SNP-X slave protocols. Requires CMM module for SNP/SNP-X master, CCM, or RTU slave support; PCM module for RTU master support.


LAN - Supports multidrop. Also supports Ethernet, FIP, Profibus, GBC, GCM, GCM+ option modules.



Battery Backed Clock




Type of Memory Storage

RAM and optional EPROM or EEPROM for early versions. Starting with hardware version IC693CPU341-J and firmware Release 4.61, only RAM and optional Flash are supported.

PCM/CCM Compatibility



Troubleshooting IC693CPU341

Troubleshooting information is available on IC693CPU341's website page; it also includes a datasheet user-manual and a wiring diagram.


Repair your IC693CPU341

PDF Supply can repair your IC693CPU341 in 3-5 business days. And PDF Supply stands by all of its repairs with a 1 year customer satisfaction warranty.


Jumper Setting for Writing to EEPROM with Early CPU Models of the 90-30.


The Model 311, 313, 323, 331, and an earlier version of the Model 341 CPUs have a User PROM option for storing user application programs, register data, and configuration data in non-volatile memory. Application programs are usually developed in a CPU's battery-backed RAM memory and executed from this RAM memory. But, if additional program integrity, or operation of the PLC without a battery is desired, an optional EEPROM or EPROM can be installed in a spare socket (labeled PROGRAM PROM) on the embedded CPU baseplates or in a socket inside the Model 331 CPU module (and inside the early versions of Model 341 CPU prior to hardware version IC693CPU341-J and firmware release 4.61). The Model 331 CPU module (and the early versions of Model 341) has a jumper labeled JP1 located next to the EEPROM/EPROM socket to allow you to select either EEPROM or EPROM. These jumper positions are shown below.


Jumper Selects

3 - 2 EEPROM

2 - 1 EPROM


Customer Questions and Answers

  • Question:  What is an IC693CPU341?  Answer:  The IC693CPU341 is a single-slot Central Processing Unit from the GE Fanuc Series 90-30. This unit is the "brains" of the PLC and is where most of the calculations take place.
  • Question:  What's the first thing you should do when testing your IC693CPU341?  Answer:  When you attach the IC693CPU341 to a 5 or 10 slot rack and power it up, you should be checking for an OK light.
  • Question:  What if I do not have an OK light after I have powered it up?  Answer:  If you don't have an OK light, then you won't be able to follow through with the test. The lack of an OK light indicates, right from the start, there is something wrong with your IC693CPU341.
  • Question:  What is this initial test showing?  Answer:  You're basically turning on the configuration and logic in this processor in order to set it to run mode. You want to see that this is a good working processor.
  • Question:  With what software should I test my IC693CPU341?  Answer:  You can test your IC693CPU341 with Proficy Machine Edition. 
  • Question:  What will I need to test my IC693CPU341?  Answer:  All you will need is your IC693CPU341, a 5 or 10 slot rack, and a power supply.
  • Question:  If I think there is a problem with my processor, what should I do?  Answer:  You should, first, make sure the RUN light comes on and then let the processor run overnight (or even 2-3 days). This is to check that it's able to sustain itself in run mode. (You want to make sure it doesn't fail or fall out of run mode for any reason.) If it does fail or fall out of run mode, then you can try reading the faults or errors through the Proficy Machine Edition software. It may give you enough information to help you fix the problem.
  • Question:  If I can't figure out how to fix my IC693CPU341, what is my next step?  Answer:  PDF Supply can repair your IC693CPU341 for you. 

For more information on the IC693CPU341 Central Processing Unit of the GE 90-30 Series, please see the Datasheet Manual. 






Upgrade Kit

New Features

Problems Resolved






  • Ignore Fatal Fault Feature
  • Time-of Day (TOD) Clock Start-up






  • DSM312 Support Added
  • FBC Editing with HHP
  • Storing Foreign Module Configuration to Slot 1
  • End Function Block
  • SVC REQ 7






  • Break-free SNP (improves modem compatibility)







  • Support for Larger Configuration File
  • Model Number Checks Removed
  • ALT-S RUN MODE STORE of Periodic Subroutine
  • HHP Write to Flash or EEPROM with IC641 Programmer Connected







  • ALT-S in Stop Mode
  • HHP Overrides
  • HHP Coil Use
  • HHP Subroutines






  • Bumpless Run Mode Store
  • PID Function Block Enhancement
  • Write Datagram
  • Zeroing Input Data of a Failed Module
  • Storing Folder to EEPROM






  • Multiple Backplane and SNP Sessions
  • Storing a Maximum Size Program Block
  • PCM Message Traffic
  • Special Register 15
  • Adding Smart Modules
  • Repetitive Fault Reporting
  • Reconfiguring Smart I/O Modules
  • Multiple Channel Connections
  • Update Utility Error Messages
  • Configuring Smart Modules with the HHP
  • Verifying RAM with Flash
  • HHP Display with Heavy Mail Traffic
  • Power Loss During Write to Flash
  • Rack Type Mismatch
  • PLC Software Fault
  • SFC Reset
  • SNPX Interrupted Message







  • SNPX Power-Cycle Recovery
  • PCM Loss Fault






  • CE Mark approval








  • DINT Function Block with Constant Parameter
  • Clearing I/O Fault Table with GBC Present but not Configured
  • Data Errors Scanning Analog and Remote Modules






  • BEM331 Genius Bus Controller
  • Sequential Function Chart Programming
  • Automatic Baud Rate Detection
  • Katakana HHP Display
  • ADS Fault Access
  • Saving Register 2049
  • PLC State After Error During Device Read
  • SNP Conformance
  • SNPX Access to System References
  • Periodic Subroutine Interval
  • Noise Immunity
  • Store Fault Registration Delay
  • Brown-Out During SNPX Session
  • OIT Response
  • Day of the Week
  • Maximum Size Blocks and Programs
  • Modem Turnaround Time

G, J






  • Periodic Subroutine and Nested MCRs






  • UL Class I Div 2 approval and C-UL approval







  • Off Delay (OFDTR) Function 14
  • Active and Constant Sweep Modes
  • SVCREQ #26: Interrogate I/O
  • SVCREQ #23: Read Master Checksum
  • Masked Compare Word (MSKCMPW) Function 143
  • Masked Compare Dword (MSCCMPD) Function 144
  • Number of Enhanced GCMs Allowed
  • SNPX Protocol
  • I/O Link Master Module
  • Retentiveness of %G References
  • End Function Within Subroutine


ST. LOUIS, Feb. 1, 2019 – Emerson today announced it has completed the purchase of Intelligent Platforms from General Electric.

Common related search terms: BatteryBuyConfigurationDatasheetEmersonFirmwareManualPriceRepairSpecificationTroubleshootWiring


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Rockwell Disclaimer: The product is used surplus. PDF Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because PDF Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, PDF Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. PDF Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. PDF Supply also makes no representations as to your right to install any such firmware on the product. PDF Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.