Carbolite nanodac - Manual (Page 59)

nanodac™
57
MC27 –EN–1.04
5.1.4 Modbus TCP
This allows the user to configure the recorder so as to allow it to communicate using Modbus
Transmission Control Protocol.
Figure 2.2.4 Modbus TCP configuration menu
PrefMaster IP The IP address of the relevant Modbus master. The Preferred master is
guaranteed to be able to connect, even if all slave connections (max. = 4 for TCP)
are in use.
Address The Modbus address for this slave. This address must be unique for the network to
which it is attached. The recorder will respond to this address and to Address 255.
Input Timeout Allows a value of between 0 and 3600 seconds to be entered to set the timeout
period for modbus input channels. If a modbus input is not written to within this
period the value of the channel is set to -9999.0 with a 'No Data' status. A value of
0 disables the comms inactivity timeout feature.
Unit ID Enable Enables/Disables the checking of the Modbus TCP unit identity field.
Strict The Modbus TCP Unit Identity Field (UIF) does not have to match the
instrument address. The instrument responds only to Hex value FF in
the UIF. iTools finds this instrument only at location 255, and then
stops scanning.
Loose The Modbus TCP Unit Identity Field (UIF) does not have to match the
instrument address. The instrument responds to any value in the UIF
Instrument The Modbus TCP Unit Identity Field (UIF) must match the instrument
address or no response will be made to messages.
Serial Mode Slave communications via the side mounted configuration port interface (CPI) clip
(for iTools use.) Parameters: Baud rate 19,200; Parity = none; Number of data bits
PrefMaster IP
Address
Input Timeout
Unit ID Enable
Serial Mode
Time Format
PrefMaster Conn
Network.Modbus
123.123.123.123
1
0 sec
Instrument
Modbus Slave
Seconds
123.123.123.123
Response Time
Master Conn 1
Response Time
Master Conn 2
Response Time
Master Conn 3
Response Time
Master Conn 4
Response Time
0
0.0.0.0
0
0.0.0.0
0
0.0.0.0
0
0.0.0.0
0