Siemens SIMATIC ET 200M Manual page 148

Removal/Insertion Interrupt with S7/M7-DP Master or DPV1 Master
If you use the ET 200M with "module change during operation" on an S7/M7-DP
master or a DPV1 master, the system behaves as follows:
S When a module is removed, the IM 153-x reports a module removal interrupt on
the DP master that executes OB 83. You program the desired response to the
module removal event in OB 83.
In the case of I/O access, OB 122 (I/O access error) is called in the DP master.
S If you insert a module that corresponds to the configuration, the IM 153-x
reports a module insertion interrupt to the DP master (OB 83 call with
diagnostics buffer entry) and assigns parameters to the module in keeping with
the stored configuration.
S If you insert a module in an unconfigured slot, the IM 153-x doesn't report a
module insertion interrupt.
S If you insert a different module than configured:
– the IM 153-x reports a module insertion interrupt to the DP master (OB 83
call with diagnostics buffer entry); but it ignores this unconfigured module.
– The module diagnosis is stopped, and you can read out the slot in which the
wrong module is inserted (see Section 6.4.5).
– The SF LED shows the error.
Note: Inserting or removing a DM 370 dummy module does not trigger an insertion
or removal interrupt.
Warning
!
Problems during removal and insertion are tolerated for up to 1 second.
This means that the output values will not change within the tolerance time in the
event of such a problem occurring.
Distributed I/O Device ET 200M
EWA-4NEB780600602-06
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Commissioning and Diagnostics
6-39