Siemens SIMATIC ET 200AL - Page 175

Interrupts, error messages, diagnostics and system alarms
5.2 Interrupts
Interface module IM 157-1 DP (6ES7157-1AA00-0AB0)
32 Manual, 12/2016, A5E32100641-AD
The following table is used to explain the channel error entries.
Description
Channel number 0 … 63: Channel number for channel error
0x8000: Entire submodule
Channel properties Bits 0 to 7 00
H
: Free data type
01
H
: bit
02
H
: 2 bit
03
H
: 4 bit
04
H
: byte
05
H
: word
06
H
: double word
07
H
to FF
H
: Reserved
Bit 8 0: Channel
1: Channel group
Bit 9, 10 00
H
: Diagnostics
01
H
: Maintenance demanded
02
H
: Maintenance required
03
H
: Reserved
Bit 11, 12 00
H
: Channel error-free
01
H
: Incoming diagnostics
02
H
: Outgoing diagnostics
03
H
: Outgoing diagnostics, but other diagnostics are also
pending on this channel
Bits 13 to 15 00
H
: Reserved
01
H
: Input channel
02
H
: Output channel
03
H
: Input/output channel
Channel error type Explanations are available in the device manuals, in the section "Diagnostic
alarms".