Siemens SIMATIC ET 200S Manual page 173

6.6.8 Channel-specific diagnosis
Definition
The channel-specific diagnosis gives information on channel errors of modules and
expands on the module diagnosis. The channel-specific diagnosis starts after the
module status (if the parameters are preset accordingly). The maximum length is
limited by the total length of the slave diagnosis from 43/62 bytes in DPV0 mode to
128 bytes in DPV1 mode. The channel-specific diagnosis does not affect the
module status.
A maximum of 9 (in DPV0 operation) or 15 (in DPV1 operation) channel-specific
diagnostic messages are possible (see also station status 3, bit 7).
ET 200S Distributed I/O System
EWA-4NEB780602402-09
Commissioning and Diagnostics
6-39