Message Structure Of The Secs/Gem Communication Software Pre-Installed Model Module - Mitsubishi Electric MELSEC iQ-R Series User Manual

Message structure of the SECS/GEM communication software
pre-installed model module
Calculate the byte length of the actual item data, and then configure the maximum length of the message using up to 5 MB as
reference.
When the MELSEC iQ-R series SECS/GEM communication software pre-installed model module is used, the maximum item
count of one message is 3000.
Item
Transmission buffer
Log Output
If too much data is transmitted, the SECS/GEM communication software operates in the following manner.
Operation
Many transactions that have large messages have been defined
An excessive message was sent
A primary message that became an excessive message was received
A secondary message that became an excessive message was received
Description
Messages of up to 5 MB can be transmitted.
The transmission buffer may be exceeded depending on the communication status.
Messages of up to 5 MB can be logged.
However, this is exceeded during logging of another message, and only the header is logged.
Description
The CIM control READY relay does not switch ON. (The SECS/GEM
communication software does not start)
Sending fails.
An abort message is returned, and there is no writing to the prescribed
register. (S9F11)
Abort reception is reported, and there is no writing to the prescribed register.
7 BASIC FUNCTIONS
73
7.4 Transaction List
7