8.3 S7 diagnostics
8.3.1 Structure of slave diagnosis
Structure of the slave diagnostics of the IM 650
The maximum length of the diagnostic data is 130 bytes.
● The identifier-related diagnostics comprises 3 bytes. The diagnostics of the maximum of 12
slots (slots 4...15) are marked in bytes 7 and 8.
● The module status totals 8 bytes: 2 bits each per slot.
● The diagnostic interrupt can have a maximum of 63 bytes.
Interrupt, error and system messages
8.3 S7 diagnostics
ET 200PA SMART
Operating Instructions, 06/2019, A5E34192013-AB 91