Panasonic BT-LH1850 Operating Instruction - Page 46

RS-485 input/output terminal, Command format

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REMOTE Specifications (continued) RS-485 input/output terminal The RS-485 interface enables external operations. The figures below show RS-485 input/output terminal pin arrangement and connections. TSL protocol version3.1 or version4.0 is supported. Make sure that the same TSL protocol versions are used on external control devices and the monitor. For information on specific systems using RS-485 input/output terminal, contact your supplier. Connection example External control device RS-485 IN RS-485 OUT RS-485 IN RS-485 OUT RS-485 IN RS-485 OUT • A loop-through connection using the RS-485 input and output terminals allows operation of multiple monitors (up to 32 monitors). • Connect a terminator (120 Ω) between the first and second pin of the OUT (output) terminal on the last monitor in the chain. „„Connectors and signals Connector: 8-pin RJ-45 connector 1 2 3 IN 4 5 6 7 8 1 2 3 OUT 4 5 6 7 8 Pin number IN OUT 1 3 2 6 3 1 4 4 5 5 6 2 7 7 8 8 Signal RXD+ RXDTXD+ N.C. N.C. TXDN.C. GND Description Received data (+) Received data (-) Send data (+) Not connected Not connected Send data (-) Not connected Ground „„Communication parameters Synchro system Transfer rate Parity Data length Stop bit Flow control Asynchronous 38,400 bps EVEN 8 bit 1 bit None „„Command format STX (02h) Header (ID) Command Data EXT (03h) The header (ID) is 8-bit data. Use the RS-485 ID SETUP function in the SYSTEM CONFIG menu to set up. Setting the most significant bit using external control device allows you to switch between TSL protocol support and "Setting command" (→page47) / "Query command" (→page49) support. Example: RS-485 ID SETUP 31 setting = (hexadecimal conver- sion)  Header 1Fh (for support of commands listed below) Header 9Fh (for TSL protocol support) When 0 is set in RS-485 ID SETUP, connected multiple monitors can be controlled. „„Response formats 1. Setting command response STX (02h) Command EXT (03h) 2. Query command response STX (02h) Data EXT (03h) 3. Error response STX (02h) Error code Error code ER001: Invalid command ER002: Parameter error EXT (03h) When 0 is set in RS-485 ID SETUP, operation is enabled but responses are not. After receiving a monitor response command, there should be a time lag of approx. 200 ms before a command is transmitted from an external control device. 46

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46
REMOTE Specifications
(continued)
RS-485 input/output terminal
The RS-485 interface enables external operations.
The figures below show RS-485 input/output terminal pin arrangement and connections.
TSL protocol version3.1 or version4.0 is supported. Make sure that the same TSL protocol versions are used on external control devices
and the monitor.
For information on specific systems using RS-485 input/output terminal, contact your supplier.
Connection example
External
control device
RS-485 IN
RS-485 OUT
RS-485 IN
RS-485 OUT
RS-485 IN
RS-485 OUT
• A loop-through connection using the RS-485 input and output terminals allows operation of multiple monitors (up to 32 monitors).
• Connect a terminator (120 Ω) between the first and second pin of the OUT (output) terminal on the last monitor in the chain.
±
Connectors and signals
Connector: 8-pin RJ-45 connector
IN
1
2
3
4
5
6
7
8
OUT
1
2
3
4
5
6
7
8
Pin number
Signal
Description
IN
OUT
1
3
RXD+
Received data (+)
2
6
RXD-
Received data (-)
3
1
TXD+
Send data (+)
4
4
N.C.
Not connected
5
5
N.C.
Not connected
6
2
TXD-
Send data (-)
7
7
N.C.
Not connected
8
8
GND
Ground
±
Communication parameters
Synchro system
Asynchronous
Transfer rate
38,400 bps
Parity
EVEN
Data length
8 bit
Stop bit
1 bit
Flow control
None
±
Command format
STX (02h)
Header (ID) Command
Data
EXT (03h)
The header (ID) is 8-bit data.
Use the RS-485 ID SETUP function in the SYSTEM CONFIG
menu to set up.
Setting the most significant bit using external control device al-
lows you to switch between TSL protocol support and “Setting
command” (→page47) / “Query command” (→page49) support.
Example: RS-485 ID SETUP 31 setting = (hexadecimal conver-
sion)
Header 1Fh (for support of commands listed below)
Header 9Fh (for TSL protocol support)
When 0 is set in RS-485 ID SETUP, connected multiple monitors
can be controlled.
±
Response formats
1.
Setting command response
STX (02h)
Command
EXT (03h)
2.
Query command response
STX (02h)
Data
EXT (03h)
3.
Error response
STX (02h)
Error code
EXT (03h)
Error code
ER001: Invalid command
ER002: Parameter error
When 0 is set in RS-485 ID SETUP, operation is enabled but
responses are not.
After receiving a monitor response command, there should be
a time lag of approx. 200 ms before a command is transmitted
from an external control device.