Servomex 02500003E, Quick Start Manual

Page: 17 / 33

Servomex 2500 Quick Start Manual
2500 Series - Configuration and Operation 02500/003E/0 17
If SINGLE display is selected, the name of a chosen measured component appears on
the top line and the measurement value on the bottom line.
The SPLIT display is used on multi component analysers only, and is used to show two
measured components at a time.
UDEF is used to select the required displayed chemical name, chemical formula and
engineering unit, e.g. carbon dioxide, CO
2
, vpm.
DEFINE SCREEN is used on multi component analysers only, and is used to specify
the sequence order in which the measured components are displayed.
VARS is used to set the number of displayed digits (DECIMAL POINTS) appearing
after the decimal point in the measurement value. This is adjustable between values of
0 to 3.
3.5 Communication Options
A standard 2500 provides RS232 serial communications. If specified, the analyser may
be fitted with additional hardware to allow digital communications using either Modbus
over RS485 or Modbus TCP over Ethernet. If either option is fitted the RS232 output is
no longer available.
The 2500 menu system displays all communication options but for correct operation
the selection must match the analyser hardware. The following table lists the options.
Go via COMMS to SET COMMS MODE - Press ENTER
At display
screen Operation
Analyser Option
NONE
OR
Select required
option using cursor
keys, then press
‘ENTER’
Any
RS232
OR
Standard
MODBUS
OR
ASCII
02500912 Communications Board RS485
MODBUS
OR
RTU
02500912 Communications Board RS485
ETHERNET
02500913 Communications Board Ethernet
NONE disables all digital communications.
RS232 enables the serial output and print functions. See section 3.7 for further details.
Modbus ASCII enables this protocol using the RS485 interface on the 02500912
Communication Board (if fitted).
Modbus RTU enables this protocol using the RS485 interface on the 02500912
Communication Board (if fitted).