Nack (Nk); Read (Rd); I/O Control Command (Cc) - Omron V720S Series Operation Manual

Reader/Writer Control Command

5-5-4 NACK (NK)

This command is used during ACK/NACK control to inform the Reader/Writer that the host device
did not normally receive a response from the Reader/Writer. When the Reader/Writer receives a
NACK command, the previous response is retried provided that the maximum number of retries (9)
has not been exceeded.
If the Reader/Writer is not waiting to receive ACK/NACK signals, an error will occur when the com-
mand is received. Refer to 5-9 ACK/NACK Control for details.
<Command Format>
STX Node No.
1 2

5-5-5 I/O Control Command (CC)

This command changes the state of the user output terminals (OUT1 to OUT4) and reads the state
of the user input terminals (IN1 to IN3).
<Command Format>
STX Node No.
1 2
OUT1to OUT4
<Response Format>
STX Node No.
1 2
Response code
OUT1 to OUT4
IN1 to IN3
Command ETX BCC
code
"NK"
2 1 1
Command OUT OUT OUT
code 1 2
"CC"
2 1 1
The state of an output is designated in hexadecimal.
Specification range: 0 to 1 (1: ON / 0: OFF)
When * is specified, the Reader/Writer reads the state of a terminal.
Retry Command Response
flag code code
"CC" "00"
1 2 2
00: Normal completion
For other response codes, refer to 5-10 Response Code List.
Indicates the state of the output.
1: ON, 0: OFF
Indicates the state of the input.
1: ON, 0: OFF
OUT ETX BCC
3 4
1 1 1 1
OUT OUT OUT OUT
1 2 3 4
1 1 1 1
Section 5-5
IN IN IN ETX BCC
1 2 3
1 1 1 1 1
5-33