User`s manual

190
4.4.2 Precautions when receiving data with an interrupt program
The following shows the precautionary notes when receiving data with an interrupt program.
(1) Create an interrupt program for data reception for each interface.
(2) Use GX Configurator-SC to set whether or not the interrupt program is started.
Whether or not the interrupt program is started can also be set with direct
writing to the buffer memory. However, if it is specified during data reception,
the interrupt program will not start.
(3) Do not use the INPUT and BIDIN instructions during execution of the interrupt
program. Always use the BUFRCVS instruction to receive data.
(4) Do not turn the reception data read completion signal (Y1/Y8) ON/OFF during
execution of the interrupt program.
(5) Use always ON (SM400) or direct input signal (DX3, DX4) as the contact signal
when executing the BUFRCVS instruction. ( Page 371, Section 17.2)