Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 98)

2 Functions of Devices in DVP-PLC
DVP-PLC Application Manual
2-70
M1002
0 MOV K300 D1000
Initial pulse
3. The maximum set value in the monitor timer is 32,767ms. Please be noted that if the SV is too big, the timing of
detecting operational errors will be delayed. Therefore, it is suggested that you remain the scan time of shorter
than 200ms.
4. Complicated instruction operations or too many extension modules being connected to the MPU will result in the
scan time being too long. Check D1010 ~ D1012 to see if the scan time exceeds the SV in D1000. In this case,
besides modifying the SV in D1000, you can also add WDT instruction (API 07) into the PLC program. When the
CPU execution progresses to WDT instruction, the internal monitor timer will be cleared as “0” and the scan time
will not exceed the set value in the monitor timer.
Function Group
Program Capacity
Number
D1002
Contents:
The program capacity differs in different series of MPUs.
1. ES/EX/SS series MPU: 3,792 Steps
2. SA/SX/SC series MPU: 7,920 Steps
3. EH/EH2/SV series MPU: 15,872 Steps
Function Group Syntax Check
Number
M1004, D1004, D1137
Contents:
1. When errors occur in syntax check, ERROR LED indicator will flash and special relay M1004 = On.
2. Timings for PLC syntax check:
a) When the power goes from “Off” to “On”.
b) When the program is written into PLC.
c) When on-line editing is being conducted.
3. The syntax check may start due to illegal use of instruction operands (devices) or incorrect program syntax loop.
The error can be detected by the error code in D1004 and error table. The address where the error exists will be
stored in D1137. (The address value in D1137 will be invalid if the error is a general loop error.)
4. See Chapter 2.12 for error codes for syntax check.
Function Group
Data Backup Memory
Number M1005~M1007
Contents: