489-P1-LO-A20-T GE Power module Brand new

"rmdir" Station Manager command 

does not work for multi-level directory 

path

The "rmdir" Station Manager command does not operate properly with a 

multi-level directory path. Instead, first change to the parent directory, 

then delete the target directory without specifying a path. For example, the 

"rmdir dir1/dir2" results in "RMDIR Failed, dir1/dir2 does not exist". 

Instead, first do "cd dir1" and then "rmdir dir2".

Intermittent Ethernet log event 8H/15H 

after power cycle

When starting after a power cycle, the Ethernet Interface may 

intermittently log an exception (entry 8H, Entry 2 = 15H, Entry 3 = 0000H, 

Entry 4 = 00aaH). This exception is benign and may be ignored.

Intermittent Modbus/TCP Server log 

events when using "killms" Station 

Manager command

When using the "killms" Station Manager command to manually terminate 

an active Modbus/TCP server connection, the following Modbus/TCP 

errors may occur in the Ethernet exception log: Event 2fH, Entry 2 = 

209H, 212H, 21bH, or 221H. These errors may be ignored.

A890 CommReq status after multiple 

ModBus Open Command attempts

When using a CommReq to open a Modbus/TCP Channel to a remote 

server, if the initial CommReq returned an AA90 status, future Open 

Commands may return an A890 status. This indicates that local 

networking resources have been consumed and are not available for 

further connection attempts. If this occurs, the application must wait at 

least 60 seconds before making the next connection attempt. This will 

allow networking resources to be released and made available for the 

next Modbus Open Command.

Modbus/TCP request packets The Modbus/TCP server expects to receive each Modbus/TCP request in 

a separate TCP packet. If multiple requests are sent in a single packet, 

the server may or may not send a response to each request. If responses 

are sent to the client, they will be sent in separate TCP packets.

EGD production delayed after RMS of 

EGD

When a produced EGD exchange is added or modified by a Run-mode 

Store, the exchange will not be produced until one production period of 

time has elapsed after the completion of the run-mode store.

Station Manager PING commands When initiating ICMP echo requests from the PLC via Station Manager’s 

PING command, the operation occasionally fails and an exception is 

logged (Event eH, Entry 2 = 6H).

Station Manager “referr” tally The EGD Station Manager “referr” tally may be incremented twice when 

an exchange timeout occurs. Exchange status word reporting works 

correctly and is not impacted. 

“wkal_idle” AUP parameter should not 

allow zero

Zero is allowed for the “wkal_idle” (TCP keep alive timer) but it is an 

invalid value.

TCP connection may time out early if 

the timeout is set above 10 minutes

If the TCP connection timeout is set higher than 10 minutes, the 

connection may timeout before the configured value. The connection 

timeout is derived from three AUP parameters:

wkal_idle + (wkal_cnt + 1) * wkal_intvl.