Delta AS Series Programming Manual page 950

Additional remarks
1.
There is no limit on the number of times you can execute the COMRS communication instruction. However, each
communication port can only be enabled by one communication instruction, and the later communication
instructions that follow are not executed.
2.
The instruction does not use checksum when you execute this instruction. If you need a checksum, use COMRS
and another available instruction.
3.
If the value in D is 2, 3, 5, 6 or 9, it is suggested that you set a timeout period. After you set a timeout period, the
2
instruction tries to send the data again if a stop character is not received.
4.
The instruction does not automatically clear the value in D
begins to receive new communication data. You can know whether and how much data the PLC receives only after
a completion flag switches from OFF to ON . If the you want to clear the values in D
instruction (API 1206).
5.
If the value in S is out of range, the instruction is not executed.
1
6.
If the number of devices starting from S
the error code in SR0 is 16#2003.
7.
If the value in D is not between 0–9, the instruction is not executed, SM0 is ON, and the error code in SR0 is
2
16#200B.
8.
If the value in D is 6, 8 or 9, and the number of devices starting from D
2
instruction is not executed, SM0 is ON, and the error code in SR0 is 16#2003.
9.
If the quantity of data received is greater than the number of devices starting from D
is ignored.
10.
If a completion flag is ON, the PLC stops receiving data. If a communication port receives data when a completion
flag is ON, the data is not received.
11.
If the setting value in S
SR0 is 16#200B.
12.
When the mode of D
2
and the error code in SR0 is 16#200B.
is not equal to the value in S
2
is not between 0–256, the instruction is not executed, SM0 is ON, and the error code in
3
is 6 or 8, the length of D +1 not between 1–256, the instruction is not executed. SM0 is ON,
2
Cha p ter 6 App l ied Ins truc tio ns
–D +n whenever the instruction is executed or the PLC
1 1
–D
1
, the instruction is executed, SM0 is ON, and
3
is not equal to the value in D
1
, the data that cannot be stored
1
+n, use the ZRST
1
+1, the
2
6 - 6 7 1
6_