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IC693CMM321 Wiring
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  • IC693CMM321 Wiring
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GE Intelligent Platforms / GE Fanuc Series 90-30

SKU 2172041  UPC 0186097397077

Part Number: IC693CMM321 / ic693cmm321
Mfr/Brand Name: GE Automation
Mfr Number: IC693CMM321 / ic693cmm321
Type: Ethernet Interface TCP/IP Module. Ethernet network connection

Technical Specifications

  • Ethernet Interface TCP/IP Module
  • PLC to an Ethernet network
  • Initiate transfer of data to the PLC
  • Communicate simultaneously to multiple devices
  • Interface with other GE Fanuc devices
  • Communicate from a Host computer
Troubleshooting and Product Information for IC693CMM321

Download product information, troubleshooting guides and operation manuals to get your PLC operational.

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Other IC693CMM321

Available Revisions:

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1C693CMM321 , GEFIC693CMM321 , CIMIC693CMM321

Product Description

The IC693CMM321 is an Ethernet Interface TCP/IP module. This allows you to connect the PLC to an Ethernet network, transfer data to the PLC from a varied device, communicate to other devices (with up to as many as 16 server connections), and interface with additional GE Fanuc. See specifications on IC693CMM321's website page.

Technical Specifications

Ethernet Interface TCP/IP Module  
PLC to an Ethernet network  
Initiate transfer of data to the PLC  
Comm simultaneously to multiple devices  
Interface with other GE Fanuc devices  
Communicates from a Host computer  


Troubleshooting IC693CMM321

Troubleshooting information is available on IC693CMM321’s website page; it also includes a datasheet user-manual and a wiring diagram.  

Repair your IC693CMM321

PDF Supply can repair your IC693CMM321 in 3-5 business days. And PDF Supply stands by all of its repairs with a 1 year customer satisfaction warranty.

Cannot Ping Series 90-30 Ethernet Card - IC693CMM321


Cannot Ping Series 90-30 Ethernet Card - IC693CMM321

Trying to connect a 90-30 PLC to an Ethernet LAN using the CMM 321 Ethernet Interface Module. Unable to connect to the PLC from the LAN. All IP parameters (IP address, subnet mask and default gateway) on the CMM321 are right, but when trying to "ping" to the PLC, it does not answer. The STAT LED on the module is always on.


What to look for:
With respect to the STAT LED - constant on is good, blinking indicates the module is waiting for new software, and off indicates an event has been recorded in the event log. Since the STAT LED is on (not blinking) the CMM321 thinks it has a good network connection (test frames were OK). The LAN LED should blink every time the CMM321 sends or receives a frame - watch this LED while pinging the module if the ping gets to the module at all the LAN LED should blink. Note the LAN LED will blink about once a minute as the module reconfirms its network connection by sending a test frame.

Possible reasons for a ping getting no response are:

  • Having 2 Network Interface Cards (NICs) in the computer - depending on how they are configured for IP address and subnet mask the ping may be sent out the wrong NIC - in general each NIC must be configured for a different subnet so the driver can tell which card to send the ping.
  • If a single NIC is in use watch out for dial up networking being active - dial up networking acts as a second NIC.
  • If the computer's IP address is not in the same subnet as the PLCs the ping will be sent to the computer's configured gateway address - if the PLC is not on the other side of the gateway there will be no response.
  • If the computer's IP address is in a different subnet from the PLCs and no gateway is configured in the computer then the ping won't be sent from the computer - computer will say the destination node is unreachable.
  • The network point you are connected to may not be the correct LAN location. (the gateway and IP addresses assigned to the CMM321 are wrong)


IC693CMM321 Ethernet Module in Expansion Rack


The 90-30 Ethernet module, IC693CMM321, can be placed in an expansion rack.


There is a small reduction (10%) to the throughput of the module. Use of the module in a remote expansion rack is also possible but in that case the throughput is severely affected (80% reduction).


Troubleshooting Ethernet Communications with Station Manager Software Tool


Station Manager software, which resides in the firmware of the PLC Ethernet Interface products listed below

  • Series 90-30 PLC Ethernet Interface (IC693CMM321), both types.
  • Series 90-30 PLC CPU364 with embedded Ethernet Interface (IC693CPU364)
  • Series 90-30 PLC CPU374 with embedded Ethernet Interface (IC693CPU374)
  • Series 90-70 PLC Ethernet Interface (Type 2) (IC697CMM742)


The Ethernet Interface enables Series 90 PLCs to communicate with other Series 90 PLCs, with GE programming software, and with computer applications developed using GE Ethernet protocols, such as CIMPLICITY- HMI. Refer to GFK-1541, TCP/IP Ethernet Communications for the Series 90 PLC User's Manual for information on installing and programming the Ethernet Interface.

  • Station Manager is a part of the communications software built into the Ethernet Interface.
  • Station Manager executes as a background function to provide interactive supervisory access to the Ethernet Interface.
  • Station Manager is available when the Ethernet Interface is in the Operational or Maintenance state. It is not available when running Power-Up Diagnostics or the Software Loader.

Station Manager Styles

This manual will refer to two different styles of Station Managers. The two styles have a similar interface, but details of the commands and output are different between the two styles.

Station Manager Styles    Style Products Supported

Style A                              IC693CMM321, IC693CPU364, IC697CMM742

Style B                              IC693CPU374

Station Manager Services

The Station Manager provides the following services

  • An interactive set of commands for an operator to interrogate and control the Ethernet Interface.
  • Access to observe and modify internal statistics, an exception log, and advanced user parameters.
  • Password security for commands that change the Ethernet Interface parameters or states.
  • The Station Manager allows you to monitor the operation of the local station (node) and the network. If a problem occurs at the local station or on the network, the Station Manager may be used to pinpoint the source of the problem through the various commands.

Serial Cable (IC693CBL316A) to be used to Connect Personal Computer to Station Manager Port.



Customer Questions and Answers

  • Question:  What is a IC693CMM321?  Answer:  The IC693CMM321 is an Ethernet Interface TCP/IP Module. This allows you to connect the PLC to an Ethernet network, transfer data to the PLC from a varied device, communicate to other devices (with up to as many as 16 server connections), and interface with additional GE Fanuc.
  • Question:  What rack size can I use for the IC693CMM321? Answer:  You can use any rack size for this product.
  • Question:  What IP address should I use when trouble shooting IC693CMM321?  Answer:  You should make sure to use an IP address that's above anything else that could be working within your network so it does not conflict with anything else. And, more importantly, so you don't get a returned ping that you are actually testing something other than the intended CMM321.
  • Question:  When testing the 10 Base T port with an Ethernet cable, how will I know that IC693CMM321 is responding? Answer:  The LAN LED light will start blinking and you will know IC693CMM321 is ready for testing.
  • Question:  How do I know IC693CMM321, upon testing, is working correctly?  Answer:  You will get an immediate response that says "reply from" followed by the address you have selected.
  • Question:  When testing the AAUI port, how will I know that IC693CMM321 is responding? Answer:  The LAN LED will start blinking and you will get an immediate response, just like with the 10 Base T port.
  • Question:  If IC693CMM321 is not responding, what is my next step? Answer:  If IC693CMM321 is not responding, your product might need repair.
  • Question:  What power supply is required for IC693CMM321?  Answer:  IC693CMM321 requires Power Supply IC693PWR321 (Rev. K or later), IC693PWR322, or IC693PWR330.
  • Question:  Does this version's hardware require an AAUI transceiver for operation on 10 Base T networks? Answer:  No, it does not.

For more information on the IC693CMM321 Module of the GE 90-30 Series, please see the Datasheet Manual.




Release History

Part Number

Firmware Version





Dec. 2012

Addresses product security issues identified in Security Advisory document KB15240 (http://support.ge-




Oct. 2010

Resolves intermittent failure of Modbus/TCP port to

respond to Modbus/TCP Client requests.



Mar. 2010

Hardware update to remove AAUI port.



Nov. 2009

See GFK-1085U for problem resolved.



Jan. 2008

See GFK-1085T for problem resolved.



Jan. 2005

See GFK-1085S for problems resolved.



Mar. 2003

Adds MODBUS/TCP COMMREQ operations for Master

and Slave; Corrects problem with interruption of Ethernet transmission.



Jul. 2002

MODBUS/TCP Master and Slave functionality for modules with catalog numbers IC693CMM321-Fx.



Nov. 2001

Full duplex capability; 10Base-T port.



Nov. 1999

See GFK-1085L for new features and problems resolved.



Jul. 1997

See GFK-1085K for new features and problems resolved.



Dec. 1996

Hardware change.



Oct. 1996

Adds support for Unsolicited Messages.



Jun. 1996

See GFK-1085E for new features and problems resolved.



Dec. 1995

Initial release. Version BA adds CE Mark approval.


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