3 Functions of Devices in DVP-PM
DVP-PM Application Manual
3-35
3.11 Functions of Special Auxiliary Relays and Special Registers
Function Group:
DVP-PM Operation Flag
Number:
M1000 ~ M1003
Explanations:
1. M1000: NO contact for monitoring DVP-PM status. M1000 remains “ON” when DVP-PM is running.
M1000
Y0
DVP-PM is running
Remains ON
Remains ON
in DVP-PM AUTO status
2. M1001: NC contact for monitoring PLC status. M1001 remains “OFF” when PLC is running.
3. M1002: Enables single positive pulse for the first scan when DVP-PM AUTO is activated. Remains OFF after the
initial pulse. Used to initialize registers, ouptuts, or counters when AUTO is executed. Pulse width = one scan
time
4. M1003: Enables single negative pulse for the first scan when DVP-PM AUTO is activated. Remains ON after the
initial pulse. Used to initialize registers, ouptuts, or counters when AUTO is executed. Pulse width = one scan
time
DVP-PM
RUN
M1000
M1001
M1002
M1003
Scan time
Function Group:
Monitor Timer
Number:
D1000
Explanations:
1. Monitor timer is used for moitoring PLC scan time. When the scan time exceeds the set value (SV) in the monitor
timer, the red ERROR LED will be ON and all outputs will be “OFF”.
2. The default in the monitor timer is 200ms. If the program is long or the operation is too complicated, MOV
instruction can be used to modify SV. See the example below for setting SV as 300ms.
M1002
0
MOV K300 D1000
Initial pulse
3. The maximum SV in the monitor timer is 32,767ms. However, care should be taken when adjusting SV. If SV in
D1000 is too big, it cost much longer to detect operation errors. Therefore, SV is suggested to be shorter than
200ms.
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