Delta AS Series Programming Manual page 969

AS Ser ies Pro gra mm in g M anu al
(including communication address, length and the start register), and the instruction executes the data exchange
function based on the original communication parameter settings.
4. When you select 16#17 (for reading and writing synchronously) in S
S (the function code for writing) is processed as invalid and 16#17 is automatically processed for writing data.
8
5. For PLC with FW V1.04.00 or previous versions: if you select16#05 or 16#06 in S
the operand S
6. The parameter values specified by the instruction are valid only while PLC is running. If you cycle the power on the
PLC, the data in the data exchange table set in HWCONFIG are taken as default values. If you want to modify the
values for parameters, use this instruction.
7. You can use the instruction to immediately set the parameters for the communication connection when the data
exchange function is not running. The new communication parameters are not used until the next cycle if the data
exchange function is running; however, the instruction changes the communication parameters for the connection
number.
For example, while the data exchange function is running with the parameters set for connection 3, you can specify
new the parameters for connection 3. The new parameters are not used until the next cycle when connection 3
starts.
8. The instruction only allows you to change the communication parameters. Refer to the following table for the flags
_6
to start and close the communication connection function if you use the PLC program to perform those functions.
When you set the automatic scan function through ISPSoft, the start/stop flag of the connection number
automatically updates the start/stop state once after the data exchange function finishes executing the scan.
The following table describes the SM flags.
SM No.
SM750
SM752–SM783
SM784–SM815
SM816–SM847
SM No.
SM862
SM864–SM895
SM896–SM927
SM928–SM959
6 - 6 9 0
(the data length) is invalid and 16#05 or 16#06 indicates writing a piece of data.
10
Attribute
R/W
Enables data exchange
R/W
Enables data exchange connections 1–32
R
Reading success for data exchange connections 1–32
R Error flags for data exchange connections 1–32
Attribute
R/W
Enables data exchange
R/W
Enables data exchange connections 1–32
R
Reading success for data exchange connections 1–32
R Error flags for data exchange connections 1–32
(the function code for reading), the operand
4
8
Explanation for COM1 data exchange parameters
Explanation for COM2 data exchange parameters
(the function code for writing),