User`s manual

409
CHAPTER 17 DEDICATED INSTRUCTIONS
17
17.8 ZP.UINI
17.8.6 Precautions
(1) Execute the UINI instruction after stopping all data communications with the
other device.
Otherwise, the following will occur.
(a) When the UINI instruction is executed during receive processing
The receive processing is stopped and the reception data accumulated until then are all discarded.
(b) When the UINI instruction is executed during transmission processing
The transmission processing is stopped upon acceptance of the UINI instruction.
(2) When a modem is connected, execute the UINI instruction after cutting off the
line with the other device. (The line is cut off when the UINI instruction is
executed.)
(3) If the communication protocol and/or transmission specifications are changed
with the UINI instruction, also change those of the other device according to
the new settings.
Also, if the station No. setting (host station No.) is changed, correct the station No. in the other device side
request message to the new station No.
(4) Simultaneous execution of dedicated instructions
The following table shows the handling for when executing another instruction during execution of the UINI
instruction or executing the UINI instruction during execution of another instruction in the same channel.
: Available, : Not available
(5) Before executing the UINI instruction, set the transmission setting
modification to "Enabled" in the GX Developer switch setting.
When the switch setting has not yet been made, the transmission setting modification is processed as "Enabled".
Instruction
Availability of
simultaneous
execution
Handling of simultaneous execution
ONDEMAND

• Dedicated instructions simultaneous execution error (7FF0H) occurs in the dedicated instruction attempted
later.
OUTPUT
PRR
INPUT
BIDOUT
BIDIN
CSET
PUTE
GETE
CPRTCL
BUFRCVS

SPBUSY
UINI  • The next instruction will be ignored until the active instruction has been completed.