52
Basic Operating Procedure Section 1-9
• Execute the STUP(237) instruction. The Board or Unit Setup Area can be
changed while the PLC power supply is ON. The STUP(237) instruction
can be used, for example, when a communications sequence for a
modem connection is executed in Protocol Macro Mode to switch the
operating mode to Host Link Mode when a certain condition is estab-
lished. This enables monitoring or programming of the CPU Unit to be
carried out from a host computer. See Appendix O Changing Port Set-
tings Using STUP(237).
Executing
Communications
The required data and ladder program are created to perform communica-
tions in the serial communications mode that has been set.
Host Link Communications
Sending C-mode and FINS Commands from Host Computers to PLCs
To send C-mode commands or FINS commands, programs must be created
on the host computer to send commands to PLCs and to receive responses
back from the PLCs. Refer to the CS/CJ-series Communications Commands
Reference Manual (W342) for details.
Sending FINS Commands from PLCs to Host Computers
SEND(090), RECV(098), and CMND(490) can be used to execute slave-initi-
ated communications. Also, programming is required at the host computer to
Inner Board Restart Bit and CPU
Bus Unit Restart Bits
Communications Board/Unit Port Settings
Change Bits
Board A60800 Unit number Port 1 Port 2
Units A50100 (Unit No. 0) Board A63601 A63602
A50101 (Unit No. 1) Units Unit No. 0 A62001 A62002
A50102 (Unit No. 2) Unit No. 1 A62101 A62102
A50103 (Unit No. 3) Unit No. 2 A62201 A62202
A50104 (Unit No. 4) Unit No. 3 A62301 A62302
A50105 (Unit No. 5) Unit No. 4 A62401 A62402
A50106 (Unit No. 6) Unit No. 5 A62501 A62502
A50107 (Unit No. 7) Unit No. 6 A62601 A62602
A50108 (Unit No. 8) Unit No. 7 A62701 A62702
A50109 (Unit No. 9) Unit No. 8 A62801 A62802
A50110 (Unit No. A) Unit No. 9 A62901 A62902
A50111 (Unit No. B) Unit No. A A63001 A63002
A50112 (Unit No. C) Unit No. B A63101 A63102
A50113 (Unit No. D) Unit No. C A63201 A63202
A50114 (Unit No. E) Unit No. D A63301 A63302
A50115 (Unit No. F) Unit No. E A63401 A63402
Unit No. F A63501 A63502
Programming to
send commands and
receive responses.
Host computer
Command
Serial Communications Board/Unit
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