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1100-2294 Rev 1
31
Baud Rate
Sets instrument baud rate for connection to RS-485 Modbus interface.
(Default: 9600 baud)
To
set baud rate:
Configure Tab
Modbus
Baud Rate, select 9600/19200, select OK to confirm
Stop Bits
Sets instrument stop bits for connection to RS-485 Modbus interface.
(Default: 1 stop bits)
To
set number of stop bits:
Configure Tab
Modbus
Stop Bits, select 1 or 2, select OK to confirm
Parity
Sets instrument parity for connection to RS-485 Modbus interface.
(Default: None)
To set parity:
Configure Tab
Modbus
Parity, select None/Odd/Even, select OK to confirm
IMPORTANT:
Stop bits must be set to 1 where parity is odd or even.
Enable 120Ω Termination
For optimal communication reliability, in RS-485 Modbus networks the last instrument physically
connected to the RS-
485 bus must include a 120Ω termination resistor. This is to reduce the
potential for electrical signal reflection on long buses due to impedance mismatches.
Typically, this requires a physical resistor with the same characteristic impedance of the bus
cable to be installed on the bus.
MGS-400 instruments include this termination resistor on all instruments and allow this
termination to be enabled via this configuration setting without the need for an external physical
resistors. To enable this termination resistor:
Configure Tab
Modbus
Enable 120Ω Termination, select enable/disable, select OK
to confirm
IMPORTANT:
Termination resistor should only be enabled on last instrument
physically connected to RS-485 bus. An external resistor should not be
connected where this is enabled on the instrument.
4.2.3.7 Output Configuration
Analog Output Range
Sets instrument analog output range. Available ranges: 1-5V (Default), 0-5V, 0-10V, 2-10V, 4-
20mA. To set range:
Configure Tab
Outputs
Analog Output Range, select desired range, select OK to
confirm
Содержание MGS-400
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