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Mitsubishi Electric MELDAS C6 Interface Manual Page 294

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B con-
Signal name
tact
ALARM MESSAGE I/F 1~4
[Function]
PLC development tool or alarm message prepared can be displayed in ALARM DIAGNOSIS screen
when values (binary code) is set to alarm interface file registers (Rn, Rn+1, Rn+2, Rn+3).
[Operation]
When table No. of previously prepared alarm message table has been set to alarm interface file
registers, alarm message, if alarm occurs, can be displayed in ALARM DIAGNOSIS screen.
Maximum 4 alarm messages can be displayed at the same time.
Alarm message can be cleared by setting "0" to alarm interface file registers.
For details of alarm message display, refer to the "PLC Programming Manual".
[Caution]
(1) Set setup parameter PLC "#6450 bit 0" to 1 to display the alarm messages.
(2) For alarm message interface, file register (R) or temporary storage (F) can be used. The
selection is made with Setup parameter PLC "#6450 bit 1".
(3) In both file register method and temporary storage method, alarm does extend to the controller.
When it is desirous to stop controller operation in case of alarm, "Auto operation "pause"
command (*SP)" signal, "Single block" (SBK) signal or interlock signal should be prepared on
the PLC side.
B con-
Signal name
tact
OPERATOR MESSAGE I/F
[Function]
Desired operator message prepared by PLC development tool can be displayed by setting value
(binary code) to operator message interface file register (Rn). Operator message appears in
ALARM DIAGNOSIS screen.
[Operation]
When table No. of previously prepared operator message table is set to operator message interface
file register, operator message can be displayed in ALARM DIAGNOSIS screen.
Operator message can be cleared by setting "0" to operator message interface file register.
For details of operator messages, refer to the "PLC Programming Manual".
[Caution]
(1) Set setup parameter PLC "#6450 bit 2" to 1 to display the operator messages.
(2) Display of operator message does not cause alarm on the controller side. When it is desirous to
stop controller operation in case of operator message display, "Auto operation "pause"
command (*SP)" signal, "Single block" (SBK) signal or interlock signal should be prepared on
the PLC side.
6. EXPLANATION OF INTERFACE SIGNALS
6.4 PLC Output Signals (Data Type: R***)
Signal
abbreviation
Signal
abbreviation
6-4-4
1st system
2nd system
R118~121
1st system
2nd system
R122
3rd system
3rd system

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