Omron SYSMAC CV Series Operation Manual page 433

Network Instructions
Control Data
Precautions
The control words, beginning with C, specify the number of bytes of control data
to be sent, the number of bytes of response data to be received, the destination
node, and other parameters. Some control data parameters depend on whether
a transmission is being received in a SYSMAC NET Link System or a SYSMAC
LINK System.
Word
C Number of bytes to send (0 to 1990, i.e., $0000 to $07C6)
C+1 Number of bytes to receive (0 to 1990, i.e., $0000 to $07C6)
C+2 Destination network address
(0 to 127, i.e., $00 to $7F)
C+3 Destination unit address
C+4 Bits 00 to 03:
No. of retries (0 to 15 in
hexadecimal,
i.e., $0 to $F)
Bits 04 to 07:
Set to 0.
C+5 Response monitoring time ( $0001 to $FFFF = 0.1 to 6553.5 seconds)
Note 1. Maximum number of bytes that can be sent or received:
SYSMAC NET Link
SYSMAC LINK
SYSMAC BUS/2
2. Set the destination network address to $00 when transmitting within the
same network.
3. The BASIC Unit interrupt number when a BASIC Unit is designated.
4. Indicates a Unit as shown in the following table.
PC
SYSMAC NET Link or SYSMAC LINK
Unit
SYSMAC BUS/2 Master, BASIC Unit,
or Personal Computer Unit
SYSMAC BUS/2 Group 2 Slave
5. The destination node number can have the following values:
System/type of transmission
SYSMAC NET Link System
SYSMAC LINK System
Broadcast to all nodes in network
Transmit within the PC
(to/from CPU Bus Units)
6. Designates the length of time that the PC retries transmission when bit 15 of
C+3 is OFF and no response is received. The default value is $0000, which
indicates 2 seconds.
7. Transmissions cannot be sent to the PC executing CMND(194) (i.e., the
Unit cannot be specified as $00 and the destination node number set to
$00).
C through C+5 must be within the values specified below. To be able use of
CMND(194), the PC must have a SYSMAC NET Link, SYSMAC LINK Unit, or
SYSMAC BUS/2 Remote I/O Master Unit mounted.
Bits 00 to 07
Bits 08 to 11:
2
Bits 12 to 15:
4
Destination node number
Bits 08 to 11:
Bit 12 to 14:
Bit 15:
System
$07C6 (1990)
$021E (542)
$021E (542)
Unit
$00
$10 to $1F: Unit numbers 0 to F
$FE: The local Unit
$10 to $1F: Unit numbers 0 to F
$90 to $CF:
Unit number+90+10 Master
address
$01 to $7E (nodes 1 to 126)
$01 to $3E (nodes 1 to 62)
$FF
$00
Section 5-36
Bits 08 to 15
1
1
3
($0 to $F)
Set to 0.
5
Transmission port number
($0 to $7)
Set to 0.
ON: No response.
OFF: Response returned.
Max. number of bytes
Setting
Possible values
6
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