Siemens SIMATIC ET 200SP IM 155-6 PN/2 HF - Explanation of parameters; Substitute value behavior

Parameters/address space
4.3 Substitute value behavior
Interface module IM 155-6 PN/2 HF (6ES7155-6AU01-0CN0)
Manual, 10/2018, A5E03915895-AH
33
4.2.2
Diagnostics (maintenance) undervoltage
Diagnostics (maintenance) undervoltage
Diagnostics (maintenance) undervoltage is triggered if the supply voltage falls below the
value 19.2 V DC. When the supply voltage then exceeds 20.4 V DC, the diagnostics alarm
is reported as outgoing.
See also
Channel diagnostics (Page 43)
4.3
Substitute value behavior
Substitute value behavior
The respective output behaves according to its configured substitute value behavior:
● Zero current or zero voltage
● Output substitute value
● Keep last value
The substitute value behavior is triggered in the following cases:
● STOP controller
● Controller failure (connection interrupted)
● Parameter assignment phase during startup
● Deactivating the IO device
● Station stop
– Missing server module
– Insertion of invalid I/O modules
– At least one I/O module is installed on an incorrect BaseUnit
Note
Reducing a configuration
If you reduce the configuration of the ET
200SP distributed I/O system and download the
configuration to the CPU, the modules which are no longe
r configured but still present
retain their original substitute value behavior. This applies until the supply voltage is
switched off at the interface module.