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In the tables below, the symbol “ ” represents that the component is not allowed to use an instruction in the program to
drive the relay or write data to the register. And if the special relay or the special register is not listed in this table, which
is reserved for the system and can not be used to drive the relay or write the data to the program either.
Description
VS1
VS1
VS1
VS1
PLC Operation Status
VS2
VS2
VS2
VS2
VSM
VSM
VSM
VSM
VS3
VS3
VS3
VS3
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M9001
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M9002
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M9003
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M9004
Clock Pulse or RTC
Flag
PLC System Operation Mode
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M9011
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M9020
M9031
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M9012
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M9021
M9032
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M9013
M9022
M9033
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M9014
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M9023
M9034
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M9025
M9039
M9024
M9026
M9027
M9028
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M9029
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M9090
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M9162
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M9163
M9015
M9016
M9017
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M9018
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M9019
VS1 VS2 VSM
VS3
Assigning Specification of Applied Operation Instructions Mode
Assign the PR operating mode. Please refer to PR (FNC 77) Instruction for details.
To protect not to operate the FROM/TO instruction repeatedly.
When M9028 = “OFF”, disallows interrupt during FROM/TO is in operation.
When M9028 = “ON”, FROM/TO in an interrupt subroutine is ineffective.
42
Assign the PWM operating time base. When M9035=“OFF”, the parameters for the PWM are by
the unit of 1ms.; when M9035= “ON”, by the unit of 0.1ms.
M9035
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2-14 Special Relay and Special Register
2-14-1 Table of Special Relay
Relay ID
No.
Series
An always “ON”, “a” Contact, M9000 is “ON” during the running PLC.
An always “OFF”, “a” Contact, M9001 is “OFF” during the running PLC.
Initial Pulse, “a” Contact, M9002 will be “ON” for a Scan Time when the moment PLC is
STOP → RUN.
Initial Pulse, “b” Contact, M9003 will be “OFF” for a Scan Time when the moment PLC is
STOP → RUN.
Error occurred. When either one of the error ag relay M9066, M9067 is “ON”, M9004=“ON” .
Alternate pulse by the period of 10ms cycle time. “ON” 5ms/“OFF” 5ms Pulse
Alternate pulse by the period of 100ms cycle time. “ON” 50ms/“OFF” 50ms Pulse
Alternate pulse by the period of 1sec. cycle time. “ON” 0.5sec./“OFF” 0.5sec. Pulse
Alternate pulse by the period of 1min. cycle time. “ON” 30sec./“OFF” 30sec. Pulse
Pause the RTC and write the values in D9013~D9019 to the RTC
Stop reading time data from the RTC
Modify RTC ±30sec.
M9018=“ON” when RTC is installed in the Main Unit.
Write wrong data onto the RTC
Zero Flag. M9020=“ON” if the result of an arithmetic instruction is “0”. (except the MUL and DIV)
Borrow Flag. M9021=“ON” if any “Borrow” occurs by the addition or subtraction instruction.
Carry Flag. M9022=“ON” if any “Carry” occurs by the arithmetic, rotary.... instruction.
Zero Flag. M90023= “ON” if the result of multiplication (MUL) or division (DIV) is “0”.
Overow Flag. M90025= “ON” if the result of division (DIV) is overowed.
Instruction execution completed ag. M9029=“ON” when the executions of some applied
instructions are completed (please refer to the relevant instructions).
All bits “ON” ag at the result of a block data comparison BKCMP (FNC194~FNC199) instruction.
To indicate the completion of HSCT instruction.
External Interrupt delay time set-up ag. Use this ag contact to active the interrupt delay function.
Clear the Non-Latched area memory.
Clear the Latched area memory.
States and contents of devices are reset at the “END”.
All Coils Y, M, S, T, C turn “OFF” and present values of T, C,
D become “0”; But, the Special M and D will not be
changed.
When M9033=“ON” and RUN → STOP, the present value and statuses of T, C, D are retained.
All the outputs are disable. When M9034=“ON”, all external outputs are forced to “OFF” but the Y
contacts for the program still operate normally.
To x PLC's Scan Time duration. When M9039=“ON”, the PLC within a constant scan duration and
the period is allocated by the D9039.
Assign the BMOV moving direction. When M9024= “OFF”, S → D; when M9024=“ON”, S ← D.
Assign the RAMP operating mode. When M9026=“OFF”, a series of ramp process will be
executed; when M9026=“ON”, one trigger signal will ramp once only.
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