DAD 141.1 Technical Manual, Rev. 2.5 – April 2015
Page 47 of 54
10.10. Communication Setup Commands
– AD, NA, BR, DX, OP, CL, TD
10.10.1. AD Device Address
This command can set up the device address in the value range from 0 to 255.
Master (PC / SPS) sends
Slave (DAD 141.1) responds
Meaning
AD
A:000
Request: Address 0 (= factory default)
AD_49
OK
Setup: Address 49
Setting the device address to “0“ will cause the device to be permanently active, listening and responding to
every command on the bus without the need for an OP command.
Note:
After editing the address you first have to save the changes (command WP) and then restart the device.
10.10.2. NA Network Address
[
Index 0x300C
]
This command displays or sets the network address of DAD 141.1 Ethernet port.
Factory default
of TCP/IP address: 192.168.0.100.
Master (PC / SPS) sends
Slave (DAD 141.1) responds
Meaning
NA
A:192.168.000.100
Request: Actual TCP/IP address
NA192.168.11.90
OK
Setup: Set the address to 192.168.11.90
Note:
A change will take effect after a reset, e.g. power off / on.
10.10.3. BR Baud Rate
With this command the following baud rates can be setup: 9600, 19200, 38400, 57600 and 115200 Baud.
Master (PC / SPS) sends
Slave (DAD 141.1) responds
Meaning
BR
B 115200
Request: 115200 Baud (= factory default)
BR_9600
OK
Setup: 9600 Baud
Factory setup:
115200 baud
Note:
After editing the baud rate you first have to save the changes (command WP) and then restart the
device.
10.10.4. DX Operation Mode Half-/Full-Duplex
The DAD 141.1 can
operate in half or full duplex mode.
Master (PC / SPS) sends
Slave (DAD 141.1) resp.
Meaning
DX
X:001
Request: DX = 1 (full duplex, factory default))
DX 0
OK
Setup: DX = 0 (half duplex)
10.10.5. OP Open Device
This command, if sent without parameters, requests the address or device number of the device active on
the bus. If sent with parameters, this enables the device defined by the parameters.
Master (PC / SPS) sends
Slave (DAD 141.1) resp.
Meaning
OP
O:003
Request: Device #3 open
OP_14
OK
Setup: Open Device #14
10.10.6. CL Close Devices
This command will close DAD 141.1 device in a bus.
Master (PC / SPS) sends
Slave (DAD 141.1) resp.
Meaning
CL
OK
Setup: All devices closed
10.10.7. TD Transmission Delay
In some half duplex applications using a PLC system, a delay of the data transmission (up to 255 milliseconds)
can be helpful due to the very quick answers of the DAD 141.1. Permitted values are 0 to 255 ms.
Master (PC / SPS) sends
Slave (DAD 141.1) resp.
Meaning
TD
T+00000
Request: 0 d
– no delay
TD_200
OK
Setup: 200 d
– 200 ms delay