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PLC Network Instructions
Note
Range of Control Data
Item
Number of bytes to send
Number of bytes to receive
Destination network address
Destination node address
Destination unit address
Response Bit
Communications port number
Number of retries
Response monitor time
Note
102
Unit Address has been set to FE, commands will be sent to the SYSMAC
LINK Unit, Controller Link Unit, or Ethernet Unit with the relevant destina-
tion node address.
Destination
PLC (CPU)
NSB (computer)
CPU Bus Unit
Inner Board
Unit connected with the network
6. Response Bit
Usually set this bit to OFF (0: required). If no response is required, set the
bit to ON (1: Not required).
7. Communications Port Number
Set the communications port number that the CMND(490) instruction will
be sent to.
8. Number of Retries
Set the number of retries for unsuccessful transmissions. You can set the
number between 1 to 15. If 15 has been set, for example, the CMND(490)
instructions will be re-transmitted up to 15 times when the PLC does not
receive a response from the destination node.
9. Response Monitor Time (Unit: 0.1 S)
Designates the length of time that the PLC retries transmission when bit
15 of C+3 is OFF and no response is received. The default value is $0000,
which indicates 2 seconds.
If more than the Number of Bytes to Receive is received, no response will be
stored. If fewer bytes are received, the response data will be stored and the
unused memory area of the PLC will remain unchanged.
The permissible ranges of control data are as follows:
0002 to 021E (2 to 542 bytes)
0002 to 021E (2 to 542 bytes)
00:
Local network
01 to 7F: Destination network address
00:
Transmission within local PLC
01 to 3E: Destination node address (1 to 62) (SYSMAC LINK)
01 to 20: Destination node address (1 to 32) (Controller Link)
01 to 7E: Destination node address (1 to 126) (Ethernet, SYSMAC NET)
FF:
Broadcasting
00:
PLC (CPU Unit)
01:
Computer (NSB), user application 1
10 to 1F,
or FE:
CPU Bus Unit (see note 1).
E1:
Inner board
FE:
SYSMAC NET Link Unit or SYSMAC LINK Unit
0 (OFF): Required
1 (ON):
Not required
0 to 7 (0 to 7)
0 to F (0 to 15)
0000:
2 s (default)
0001 to FFFF: 0.1 to 6,553.5 s with 0.1-s increments (set by the user)
(1) FE, or unit number + 10 (FE can be set when the destination is a SYS-
MAC NET Link, SYSMAC LINK Unit, Controller Link Unit, or Ethernet
Unit.
Address (hexadecimal)
00
01 (user application)
10 to 1F: Unit Number 0 to F (0 to15)
E1
FE
Value
Section 6-2
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