IM 155-6 PN ST interface module (6ES7155-6AU01-0BN0)
Equipment Manual, 10/2020, A5E03576904-AE
39
Compatibility between the versions of the IM 155-6 PN ST
The table below describes which version you can use in the configuration for which actually
plugged version of the IM 155-6 PN ST interface module. The table also describes the
functional differences of the versions of the IM 155-6 PN ST interface module.
IM 155-6 PN ST
configured
Changes compared to previous version
• The "Group diagnostics: Missing supply volt-
age L+" parameter can be set on the server
module
• "Status of supply voltage L+ of the I/O mod-
ules" can be configured on the server module
• User data 512 bytes
Station extension via ET-Connection
• Support of submodules
-6 PN ST (6ES7155-6AU00-0BN0) with firmware version V4.1
You can upgrade the previous version of the IM 155
-6 PN ST interface module (6ES7155-
00-0BN0) to the firmware version V4.1. In this case configure the module as IM 155-
6 PN
ST interface module (6ES7155-6AU01-0BN0) with firmware version V4.1.
Status of the supply voltage
Load voltage diagnostics are only valid if the station started up with a valid and complete
configuration.
• For modules in the following table without a parameter assignment, the status of the
supply voltage is always signaled as "1" regardless of the actual status of the supply
voltage.
• If a potential group is exclusively made up of modules without parameter assignment
from the table below, no group diagnostics "Missing supply voltage L+" is signaled for this
potential group.