Emerson MRLDS-250, Installation And Operation Manual

Page: 31 / 40

Analog Output Registers MODBUS Communications • 25
7.4. Analog Output Registers
Analog output registers are readable (using function code 03) and writable (using function code 06).
Table 7-2 - Analog Output Registers
Reg Description Range Units P.-##
2000 Alarm setpoint 75-3500 PPM P.-02
2001 Alarm ON delay
(Alarm flag register
3000 is set to 1)
0-15 min P.-04
2002
2003 Alarm OFF delay 0-15 min P.-05
2004 Relay action 0=NO
1=Failsafe
none P.-06
2005 Relay latching enable 0=Disable
1=Enable none P.-07
2006 Buzzer enable 0=Disable
1=Enable none P.-08
2007 Display mode 0=Off
1=On none P.-09
2008 Analog output type 0=0-5 V
1=1-4 V
2=0-10 V
3=2-10 V
4=4-20 ma none P.-03
2009 Baud rate 0=9600
1=19200 none P.-13
2010 Stop bits 1 or 2 none P.-14
2011 Gas curve number 1 to 4
(broadband
unit) or gas
type (gas
specific) none P.-11
2012 Analog output full scale
PPM (R/O) 100-3500 PPM P.-16
2013 Parity 0=None
1=Odd
2=Even none P.-15
Buzzer mute time 0-59 min P.-12