Chapter 8 Communication Functions
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8.2.3 Instruction

1) User defined communication instruction(SNDCOM)

Available Device Flag
Instruction M P K L F T C S D
#D integer
No. of
steps Error
(F110) Zero
(F111) Carry
(F112)
Ch ○
n1 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
D ○ ○ ○ ○

○ ○

7 ○
Ch Designated communication channel
n1 Frame lists which is designated at parameter
Error
(F110)
Error flag turns on when designating area is
over and the instruction isn’t executed D Device which the communication status is stored
■ SNDCOM Ch n1 D

(1) Function

• When the execution condition is on, the communication starts with protocol at parameter which is designated early.
• ‘Ch’ is communication channel and ‘n’ is a frame number at parameter which is designated
• ‘D’ is a device which the communication status is stored.
(2) example of program
• When input condition is on, channel 1 stars communication with protocol at user defined parameter rnumber 3.
• The communication state is stored M000 and the format of M000 Iis as below
bit 15 bit 8 bit 1 bit 0
• Done bit : When transfer is completed normally, this bit turns on during 1 scan.
• Error bit : When communication error occurs, ,this bit turns on.
• Error code : When error bit turns on, the error code is stored.
Error code (1 byte)
Error bit
Donebit
SNDCOM
User defined communication instruction
Flag Set Designation