Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 107)

2 Functions of Devices in DVP-PLC
DVP-PLC Application Manual 2-79
Example 1: Modifying communication format of COM2
1. Add the program code below on top of the program to modify the communication format of COM2. When PLC
switches from STOP to TUN, the program will detect whether M1120 is On in the first scan time. If M1120 is On,
the program will modify the relevant settings of COM2 according to the value set in D1120.
2. Modify the communication format of COM2 into ASCII mode, 57,600bps, 7 data bits, even parity, 1 stop bit
(57,600, 7, E, 1)
MOV H86 D1120
SET M1120
M1002
Notes:
1. If COM2 is to be used as a Slave terminal, make sure there is no communication instruction existing in the
program.
2. After the communication format is modified, the format will stay intact when PLC switches from RUN to
STOP.
3. If you shut down the power of the PLC and repower it again, the modified communication format will return
to default setting.
Example 2: Modifying the communication format of COM1
1. Add the program code below on top of the program to modify the communication format of COM1. When PLC
switches from STOP to TUN, the program will detect whether M1138 is On in the first scan time. If M1138 is On,
the program will modify the relevant settings of COM1 according to the value set in D1036.
2. Modify the communication format of COM1 into ASCII mode, 115,200bps, 7 data bits, even parity, 1 stop bit
(115,200, 7, E, 1)
MOV H86 D1036
SET M1138
M1002
Notes:
1. After the communication format is modified, the format will stay intact when PLC switches from RUN to
STOP.
2. If you shut down the power of the PLC and repower it again, the modified communication format will return
to default setting.
Example 3: Modifying the communication format of COM3
1. The communication format of COM3 is fixed as 7 data bits, even parity, 1 stop bit. Add the program code below
on top of the program to modify the baud rate of COM3 into 38,400bps. When PLC switches from STOP to TUN,