MSA BACHARACH MGS-401, Руководство пользователя

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BACHARACH MGS-401 User Manual
4. MGS-401 Configuration
The configuration of the MGS-401 is done with (3) banks of DIP switches on the back of the MGS-401 lid.
Through these switches the user can configure the Modbus settings, MGS-401 Entrance Monitor as well as
many features of the perimeter strobe, on-board audible sounder as well as input and output configurations.
Follow the directions below to configure your instrument.
Figure 4 MGS-401 DIP Switch configuration.
4.1 BMS Modbus Configuration
4.1.1
The MGS-401 Entrance Monitor can be used as a standalone device to monitor up to (4) MGS gas sensors
or it can be used as part of a higher-level Building Automation System. Switch bank 1, positions 1 through
8 (see figure 2.5,
MGS-401 Under Lid Connections and Configuration ) are used to configure the BMS
Modbus Server settings when use with higher level controls. Please refer to Modbus best practice when
making these choices
. It is important ALL of the following instrument settings corresponded to the BMS
settings for proper operation.
1. Bank 1, Switch 1 is used to enable the BMS Modbus terminating resistor. The default is ‘disabled’
or OFF.
2. Bank 1, Switch 2 is used to enable the parity of the Modbus network. The default is ‘disabled’, ‘no
parity’ or OFF.
3. Bank 1, Switch 3 is used to set the parity of the Modbus network to either ‘even’ – OFF switch
position or ‘odd’ – ON switch position. The default is ‘even’ parity or OFF.
4. Bank 1, Switch 4 is used to set the Stop Bit of the Modbus network to either ‘1’ or ‘2’. The default
is STOP BIT ‘1’ or OFF.
5. Bank 1 Switch 5 is used to set the Baud Rate of the Modbus network to either ‘9600’ or ‘19200’.
The default Baud Rate is ‘9600’ or OFF.
6. Bank 1, Switches 6, 7 and 8 are used to assign a Modbus ID to the MGS-401 when used on a BMS