Diagnostics; Behavior Of The I/O Module In The Event Of An Error; Diagnostics Via Process Image; Table 12 Overview Of The Diagnostics And Status Messages Of The Smi Master Module - WAGO 750 Product Manual

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Diagnostics

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7.1 Behavior of the I/O Module in the Event of an Error

The behavior of the SMI master module if a diagnostic is present depends on the configu-
ration. The diagnostics can be globally activated or deactivated in the WAGO SMI Config-
urator and via IEC function blocks.
If a diagnostic is present, the SMI master module displays a general error. At most one
corresponding status bit can also be set according to the diagnostic detected. Therefore,
the diagnostics are prioritized. If multiple errors are present at the same time, the higher-
priority diagnostic is displayed (see
The SMI master module provides diagnostics for the following events:
• Controller failure
• Forced position active
• Undervoltage field supply
• Short circuit of SMI connections

7.2 Diagnostics via Process Image

The SMI master module outputs non-deactivatable status messages in process data
communication via one bit in the extended status byte for the following events:
• Energy saving mode active
• Controller locking active
• Status of the digital input
The table below shows the statuses of the SMI master module with possible diagnostics
and status messages.
Status Byte
Status Bit 6
(General Error)
1
1
1
1
0
0
0
Product manual | Version: 3.0.0
SMI Master LoVo; 24 VDC
8 Control and Status Bytes
Table 12: Overview of the Diagnostics and Status Messages of the SMI Master Module
Bit Set
−
Bit 3
Bit 4
−
−
−
−
[} 19]).
Extended Status Byte Diagnostic
Bit Set
− Controller failure
− Undervoltage field supply
− Short circuit of SMI con-
nections
Bit 0 Forced position active
Bit 1 Energy saving mode ac-
tive
Bit 2 Controller locking active
Bit 8 Status of the digital input
Diagnostics
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