9DEDICATED INSTRUCTIONS
Error
(1)When a dedicated instruction is completed abnormally, the abnormal completion signal, (D)+1, turns on and the error code is stored in the transmission result (S1)+1.
In case of operation errors, the error flag (SM0) turns on and the error code is stored in the SD0.
See one of the following manuals according to the error code, and check and correct the error.
<Error code>
4FFFH or less : QCPU(Q Mode) User's Manual
(Hardware Design, Maintenance and Inspection) 7000H or more: Section 10.2 of the User's Manual (Basic)
Program example
The following example shows a program that sends any data stored in D11 to D15 using the non procedure protocol.
When input/output signals of the Q series C24 are from X/Y00 to X/Y1F:
The transmission command is converted into pulse.
Transmission data is stored.
Designate the number of the interface (CH
) that will send the data.
Clear the transmission result storage device to 0.
Designate the transmission data count in word units. (Designate K10 when the unit is bytes.)
The transmission data stored in the designated device is sent.
After the OUTPUT instruction is executed, the user designated transmission complete signal (M0) turns ON for one scan.
Storing the transmission data and writing the transmission data count in the buffer memory, and issuing a transmission request to the Q series C24 are all executed by the PLC CPU.
The completion flag is reset by an external instruction.
9 - 7 | 9 - 7 |