6. PROFIBUS COMMUNICATION
IMR01Y35-E3
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6.2.4 Registers assigned to PLC
Set the register area after the GSD file is read to the configuration tool for the PLC.
The static data request read, static data request write and dynamic data request registers are set to the
register area.
In addition to the above register area setting, the following data is set at the beginning of the register.
•
Read register: Error state (1-byte), Write permission flag (1-byte), Write control flag (10-byte)
•
Write register: Write permission flag (1-byte), Write control flag (10-byte)
Error state register
The first read only 1-byte register consists of bits of error state.
Error state register
Bit 7
Bit 3 Bit 2 Bit 1 Bit 0
Bit 0: Instrument error
0: No instrument error
1: Instrument error
Bit 1: Time-out error
0: No time-out error
1: Time-out error
Bit 2: Controller communication validate/invalidate
0: Controller communication is validated
1: Controller communication is invalidated
Bit 3: Controller communication initialization
0: Completed initialization of controller communication
1: During initialization of controller communication
Instrument error
In case of the following either, become an error.
−
None of the controllers is connected.
−
COM-JG is hardware abnormally.
If an instrument error occurs, the RUN lamp at the front of COM-JG flashes (flashes slowly).
Time-out error
Successive communication time-out occurring twice in the same controller after PROFIBUS is
initialized causes a time-out error. Communication continues even during the time-out error and
recovers with no time-out error when the communication returns to normal.
Time-out time: 3 seconds
Unused
