Filter
Top Products
RS-232C interface
1. Introduction
(1) The VTR can be operated by commands when the RS-232C interface is used.
(See command table on page 79 – 81.)
(2) Conditions for acknowledging commands from RS-232C interface
The front panel REMOTE/LOCAL switch must be at REMOTE.
The setup menu item No. 204 “RS232C SEL” must be ON.
If the above conditions are not met, [ACK] + [STX]ER001 [EXT] is returned to the external unit.
Whether the [ACK] code is returned depends on the setting which has been selected for setup menu item No. 209
“RETURN ACK”.
2. Hardware specifications
External interface specifications
1) Connector specifications
Connector: D-SUB 25-pin (crossover cable supported)
Pin No. Signal
Circuit name
1
FG
Protective ground
2
RXD
Received data
3
TXD
Transmitted data
4 CTS
Clear to send
5
RTS
Request to send
6
DTR
Data terminal ready
7
SG
Signal ground
20
DSR
Data set ready
2)
Example of connection with controller (PC)
Using crossover cable with D-SUB 25-pin
connectors
PC side
(D-SUB 25-pin
connector)
FG 1
TXD 2
RXD 3
RTS 4
CTS 5
DSR 6
SG 7
DTR 20
VTR side
1
FG
2
RXD
3
TXD
4
CTS
5
RTS
6
DTR
7
SG
20
DSR
Description
Frame ground
Data is sent to PC.
Data is received from PC.
Shorted with pin 5.
Shorted with pin 4.
No processing
Signal ground
+ voltage output after communication enable status
Using crossover cable with D-SUB O-pin and
25-pin connectors
PC side
(D-SUB 9-pin
connector)
RXD
2
TXD
3
DTR
4
SG
5
DSR
6
RTS
7
CTS
8
VTR side
1
FG
2
RXD
3
TXD
4
CTS
5
RTS
6
DTR
7
SG
20
DSR
-76-