D1: Diagnostics tools
5.5 PLC status
Basic Functions
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Function Manual, 09/2011, 6FC5397-0BP40-2BA0
5.5
PLC status
PLC status signals can be checked and altered via the operator panel in the "Diagnostics" operating area.
Application
The end customer or service personnel can use this function on site without a programming device to do the
following:
• Check the input and output signals of the PLC I/Os.
• Carry out limited troubleshooting
• Check the interface signals for diagnostic purposes.
Operation
For information about status display operation and changing PLC signals, refer to the Operator's Guide for the
relevant HMI software.
Status display
The status of the following data can be displayed on the operator panel.
• Interface signals from the machine control panel
• Interface signals to the machine control panel
• Interface signals between the NCK and PLC
• Interface signals between the HMI and PLC
• Data blocks (DB 0-127)
• Flags (FB 0-255)
• Timers (T 0-127)
• Counters (C 0-63)
• Inputs (IB 0-127)
• Outputs (QB 0-127)
For a breakdown of the interface signals (DBx, DBBy), refer to:
References:
/LIS2/ Lists (Volume 2)
Change in status
The status of the above signals can be changed for test purposes. Signal combinations are also possible. A
maximum of ten operands can be altered at any one time.
