4-25
D Control Data C1
Communications port (internal logical port): 0 to 7 Hex
Serial port No. (physical port)
Destination unit address
Serial Communications Unit: Unit number + 10 Hex
Serial Communications Board: E1 Hex
D Send Data Word Allocations (Third Operand of PMCR Instruction)
Word No. Data format Data
S+0 No. of send data words
(4-digit Hex)
Set the number of words of data to be sent (from S+0 to the end
of the data).
Setting range: 0005 Hex to 00FA Hex (5 to 250 in decimal)
S+1 Reserved Node No.
(2-digit BCD)
The node number of the Cam Positioner is 00 Hex.
Set 0000 Hex in S+1.
S+2 MRC
(2-digit Hex)
SRC
(2-digit Hex)
Set the command code of the service to be used. (Refer to
4-2-1 Command Frame.)
S+3 No. of send data bytes
(4-digit Hex)
Set the amount of data that follows the command code (MRC,
SRC) and ends immediately before ETX.
Setting range: 0000 Hex to 0492 Hex (0 to 984 in decimal)
For sequence No. 600, set the number of bytes of data that has
been converted into ASCII code (that is, the number of bytes
set in S+4 and subsequent operands multiplied by 2).
For sequence No. 602, set the number of bytes set in S+4 and
subsequent operands.
S+4
onwards
Send data (4-digit Hex) Set the data to be sent.
For sequence No. 600, data that has been converted from
hexadecimal to ASCII code is sent.
For sequence No. 602, data is sent without being converted.
D Receive Data Word Allocations (Fourth Operand of PMCR Instruction)
Word No. Data format Data
D+0 No. of received data
words (4-digit Hex)
The number of received data words (from D+0 to the end of received
data) is stored.
Range: 0003 Hex to 00FA Hex (3 to 250 in decimal)
D+1 Response code
(4-digit Hex)
Response code (MRES, SRES) is stored as a 4-digit hexadecimal
value.
D+2 Received data (4-digit
Hex)
Data that follows the response code (MRES, SRES) and ends
immediately before ETX is stored.
For sequence No. 600, data that starts from the largest word number of
the received data words (D + number of received data words + 1) and
continues until D+2 in descending order is stored.
For sequence No. 602, data is stored sequentially starting from D+2.
Communications Chapter 4
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