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Syntax:
CALL PLCINIT(id,cmd)
Comments:
id specifies the address of the PLC that you wish to initialize. For the
FA-1J and FA-2J series PLC, this number will always be 1.
cmd specifies the type of PLC protocol that you are initiating :
1 - FA-1J on com port 1
2 - FA-2J on com port 1
3 - FA-1J on com port 2
4 - FA-2J on com port 2
Examples:
10 CALL PLCINIT(1,1)
Establishes communication with the Idec FA-1J on communications port 1.
10 CALL PLCINIT(1,4)
Establishes communication with the Idec FA-2J on communications port 4.
CALL PLCREAD Statement
Purpose:
This command is used to read the value(s) in a PLC’s registers, the status
of bits, or any other accessible memory location within the PLC.
Syntax:
CALL PLCREAD
(id,cmd,start address,# ofregisters/bits,variable/array)
Comments:
id specifies the address of the IDEC - always use 1.
cmd specifies the read operation you wish to perform. See the table under
Available Commands for the read operation possibilities:
address
-
describes where in memory the value is to be read from
count - number of bits to be read ( when using command of size WORD this
will be a 1 )
variable/number - this is the variable or number that is to be written in
memory in the case of a the variable that will store the value being read
Examples
CALL PLCREAD( 1, 9, 400, 13, a%)
Starting at address 400 in the internal relays of the Idec, this command will
instruct the PLC to read the first 13 bits and store the result into a%.
PLC Interface Commands PLC Specific Information
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