I/O Allocation
4-4
4.1.2 I/O Allocation of Serial Communication Unit
Input signal
Input
signal
Communication
port
Name
Description
Effective
operation
mode
X0
For COM.1 Port
X1
For COM.2 Port
X2
For COM.3 Port
X3
For COM.4 Port
General-
purpose
communication
Reception
done flag
When the unit completes the data reception,
it turns on (1).
Waiting for data reception: 0, Reception
completed: 1
General-
purpose
communication
X4
For COM.1 Port
X5
For COM.2 Port
X6
For COM.3 Port
X7
For COM.4 Port
General-
purpose
communication
Reception
done (copy)
flag
It turns on (1) if there are copied data when
GPRECV instruction is executed. It turns off
(0) when END instruction is executed.
(Note 1)
Reading completed: 1
No data to be read: 0
General-
purpose
communication
X8
For COM.1 Port
X9
For COM.2 Port
XA
For COM.3 Port
XB
For COM.4 Port
General-
purpose
communication
Clear to send
flag
It turns on (1) when the unit is set to the
general-purpose communication mode. It
turns off (0) in other modes.
General-
purpose
communication
XC
For COM.1 Port
XD
For COM.2 Port
XE
For COM.3 Port
XF
For COM.4 Port
Master
communication
Clear to send
flag
It turns on (1) when the unit is set to modes
other than the PLC link mode or general-
purpose communication mode. It turns off (0)
in other modes.
MEWTOCOL
MODBUS-RTU
X10
For COM.1 Port
X11
For COM.2 Port
X12
For COM.3 Port
X13
For COM.4 Port
Reset done
When the communication channel is reset
under the output Y10 - Y13, the flag is
turned on (1) once the resetting operation is
completed.
Resetting done: 1
Y10 - Y12 is off: 0
General-
purpose
communication
X14
For COM.1 Port
X16
For COM.3 Port
CTS signal
monitor
Status of the CTS signal sent from the
device communicating with.
Clear to send from COM.1/COM.3 port = 0
Cannot send from COM.1/COM.3 port = 1
The RTS signal can be controlled with
Y14/Y16.
When RS/CS is
set to valid in
Communication
Cassette
COM.1/COM.3
X15,
X17
- X1F
-
Not used
Do not use this.
(Note 1) The general-purpose communication reception done (copy) flag is effective after the execution of the RECV
instruction until one of the following instructions is executed. This flag does not remain ON across several scans.
Execute 1: END instruction (scan header), and 2: RECV instruction
(Note 2): The I/O numbers actually allocated are the numbers based on the starting word number allocated to the unit.
Example) When the starting word number for the unit is "10", the general-purpose communication reception
done flag for COM.1 port is X100.
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Страница 10: ...Table of Contents viii Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 21: ...2 Names and Functions of Parts Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 24: ...Names and Functions of Parts 2 4 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 25: ...3 Wiring the COM Port Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 45: ...3 I O Allocation Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 52: ...I O Allocation 4 8 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 57: ...6 PLC Link Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 97: ...9 General Purpose Communication Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 114: ...General Purpose Communication 9 18 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 115: ...4 Troubleshooting Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 124: ...Troubleshooting 10 10 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 125: ...11 Specifications Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...