Eaton ELC-PB, Programming Manual

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2. Prog rammi ng Con cep ts
M N050 03003E F or m ore info rm ati on vi sit: www.eaton.co m 2-83
M1002
0
MOV K300 D1000
Primary 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 large, it will take much longer for operation errors to be
detected. Therefore, SV is recommended to be shorter than 200ms.
4. Scan time could be prolonged due to complicated instruction operations or by the use of
many I/O modules. Check D1010 ~ D1012 to see if the scan time exceeds the SV value in
D1000. Besides modifying the SV value in D1000, you can also apply the WDT instruction
(API 07). When program execution progresses to WDT instruction, the internal monitor timer
will be reset and therefore the scan time will not exceed the set value in the monitor timer.
Function Group Program Capacity
Number D1002
Contents:
This register holds the program capacity of the ELC.
1. ELC-PB, ELCB-PB controllers: 3,792 Steps (Word)
2. ELC-PC/PA/PH controllers: 7,920 Steps (Word)
3. ELC-PV controllers: 15,872 Steps (Word)
4. ELCM-PH/M-PA controllers: 15,872 Steps (Word)
Function Group Grammar
Number M1004, D1004, D1137
Contents:
1. When errors occur in the syntax check, the ERROR LED indicator will flash and special relay
M1004 = ON.
2. Timings for the ELC syntax check:
a)
When the power goes from “OFF” to “ON”.
b) When ELCSoft writes the program into the ELC.
c) When on-line editing is being conducted between the ELCM-PH/PA and ELCSoft.
3. Errors might result from a parameter error or a program error. The error code of the error will
be placed in D1004. The address where the fault is located is saved in D1137. If the error
belongs to a loop error, it may not have an address associated with it. In this case the value in
D1137 is invalid.
Function Group Scan Time-out Timer
Number M1008, D1008
Contents:
1. When scan time-outs occur during program execution, the ELC ERROR LED will light and
M1008=ON.