Baumuller b maXX BMC-M-SAF-02, Руководство по эксплуатации

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Troubleshooting and rectification
Operation Manual b maXX safe PLC BMC-M-SAF-02
Document no.: 5.07020.04
85
of 118
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Diagnostic results can be transmitted to the safety control via the bus protocol. The extent
of the diagnostic options depends on the I/O terminals used.
Error
H8 (red) on The b maXX safe PLC module could not initialize the I/O bus.
The reason for an unsuccessful I/O bus initialization may be:
m
There is a defect or connection error of a module (such as the I/O module) which is
plugged in on the right of the power supply.
→
Does the error also occur if only the b maXX safe PLC, its power supply, an
I/O module and an end module are being used?
The assembly and disassembly of the modules may only be conducted when
the power has been disconnected. See the respective operation manual
of the modules for assembly and disassembly.
Yes: At first exchange the IO/ module. If the error recurs exchange the end module.
If you plug the end module direct to the power supply, i.e. operate without an
I/O module, you always get an error message.
Check the contacts between the b maXX safe PLC and power supply
for bent pins. Exchange the b maXX safe PLC or the power supply
if necessary.
No: Assemble the other modules (and always an end module) sequentially until
you can detect the defective module.
→
Are multiple I/O modules and one end module plugged in?
The assembly and disassembly of the modules may only be conducted
when the power has been disconnected. See the respective operation
manual of the modules for assembly and disassembly.
No: Assemble the other modules (and always an end module) sequentially until
you can detect the defective module.
CAUTION!
I/O terminals which are used in a safety oriented manner must have suitable approv-
al. Safe I/O terminals must have an own diagnostic procedure.
NOTICE!
Even if the initialization of the I/O bus was not successful (H8[red] is on), the boot
project will still be loaded and the user program code will still be executed.
This means that you can use the b maXX safe PLC and the further modules without
the I/O bus modules.