Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 109)

2 Functions of Devices in DVP-PLC
DVP-PLC Application Manual 2-81
MOV H86 D1120
SET M1120
M1002
SET M1143
FEND
IRET
END
I170
EI
With I170 in the program, when COM2 is in Slave mode and there are communication data coming in, PLC will
process the data and respond immediately.
Notes:
1. DO NOT updat program on-line when using I170.
2. The scan time of PLC will be slightly longer.
Function Group
Communication Response Delay
Number
D1038
Contents:
1. When PLC is used as slave station, in RS-485 communication interface, users can set up communication
response delay time ranging from 0 to 10,000 (0 ~ 1 second). If the time is without the range, D1038 = O (time
unit: 0.1ms). The set value of time must be less than that in D1000(scan time-out timer WDT).
2. In EASY PLC LINK, you can set up delayed transmission of the next communication data (unit: 1 scan period for
SA/SX/SC; 0.1ms for EH/EH2/SV).
Function Group Fixed Scan Time
Number M1039, D1039
Contents:
1. When M1039 = On, the scan time of program is determined by the content in D1039. When the execution of the
program is completed, the next scan will take place when the fixed scan time is reached. If the content in D1039
is less than the actual scan time of the program, the scan time will follow the actual scan time of the program.
M1000
Normally On
contact
MOV P K20 D1039
M1039 Fixed scan time
Scan time is fixed to 20ms
2. Instructions related to scan time, RAMP (API 67), HKY (API 71), SEGL (API 74), ARWS (API 75) and PR (API
77) should be used together with “fixed scan time” or “constant interruption”.