8
Operating instructions
Solenoid interlock
MZM 100
MZM 100 B
EN
Table 3: I/O data and diagnostic data
Communication directions:
request byte: from the PLC to the local electronic safety switchgear response byte: from the local electronic safety
switchgear to the PLC warning/error byte: from the local electronic safety switchgear to the PLC
Bit n° Request byte
Response byte
Diagnostic
Error warning
Diagnostic
Error
Bit 0:
Magnet in,
error reset
Safety output
activated
Error output Y1
Error output Y1
Bit 1:
Latching force bit
Actuator detected
Error output Y2
Error output Y2
Bit 2:
Latching force bit
Solenoid interlock locked Cross-wire short
Cross-wire short
Bit 3:
Latching force bit
---
Magnet temperature too high
Magnet temperature too high
Bit 4:
---
Input condition
X1 and X2
Locking blocked or
F < 500 N
incorrect or defective actuator
Bit 5:
---
---
Internal device error
Internal device error
Bit 6:
---
Error warning
Communication error between the field
bus Gateway and the safety switchgear
Violent separation of actuator and
solenoid interlock (only in connection
with "Solenoid interlock monitored")
Bit 7:
Error reset
Error (enabling path
switched off)
Operating voltage too low
Operating voltage too low
The described condition is reached, when Bit = 1
6.3 Solenoid interlock with serial diagnostic function
Solenoid interlocks with serial diagnostic function have a serial input
and output instead of the conventional diagnostic output If SD devices
are wired in series, the safety channels as well as the inputs and
outputs of the diagnostic channels are wired in series The diagnostic
data are transmitted through the series-wiring of the inputs and outputs
Max 31 safety switchgear with serial diagnostics can be wired in series
For the evaluation of the serial diagnostics line either the PROFIBUS-
Gateway SD-I-DP-V0-2 or the Universal-Gateway SD-I-U- are used
This SD-Gateway is integrated as a slave in an existing field bus
system In this way, the diagnostic signals can be evaluated by means
of a PLC The necessary software for the integration of the
SD-Gateway is available for download at wwwschmersalnet
The response data and the diagnostic data are automatically and
permanently written in an input byte of the PLC for each safety device
in the series-wired chain The request data for each safety device is
transmitted to the component through an output byte of the PLC
In case of a communication error between the SD-gateway and the
safety device, the switching condition of the solenoid interlock is
maintained
Error
A fault has occurred, which causes the safety outputs to be disabled
The fault is reset, when the cause is eliminated and bit 7 of the request
byte changes from 1 to 0 or the safety guard is opened Faults at the
safety outputs are only deleted upon the next release, as the fault
rectification cannot be detected sooner
Error warning
A fault has occurred, which causes the safety outputs to be disabled
after 30 minutes The safety outputs initially remain enabled
This enables the shutdown of the process in a controlled manner
An error warning is deleted when the cause of error is eliminated
Diagnostic error (warning)
If an error (warning) is signalled in the response byte, detailed fault
information can be read out
