S4000C
34
8.8.14 Com2 Data Format
A read command returns the current data format for Com2. A write command changes the data
format to the requested values. Valid settings are shown in the table below.
Factory default is
8-N-1.
Data
Parity
Stop
Format
Data(Bits 9-8)
Access
8 None 1 8-N-1
0
Read/Write
8
Even
1
8-E-1
1
Read/Write
8 Odd 1 8-O-1
2
Read/Write
8
None
2
8-N-2
3
Read/Write
Table 16: Com2 Data Format
Exception: If the data format is not in range, an illegal data value (03) is returned.
8.8.15 Cal Level
A read returns the current settings for the Calibration Level. A write changes the Calibration
Level that will be used during the next and subsequent calibrations. Valid levels are 25 to 90.
8.8.16 Reset Alarms
A write to this register with a data value of 1 will reset any latched alarms provided the current
gas level is below the alarm set point.
On the S4000C it will also reset the latching over-range function provided the gas level is below
100% LEL.
8.8.17 Sensor Life
A read returns the current estimate of remaining sensor life in percentage.
8.8.18 HazardWatch (Co – Calibration Output)
A read to this register will return the status of the HazardWatch Option.
0x01 enables this option, 0x00 disables this option, similar to the write.
NOTE:
Only Com1 can support read/write to this register.
8.8.19 Total Receive Errors
A read indicates the total MODBUS Comm Receive Errors that occurred in the slave device.
The maximum count is 255 and then the counter will rollover to zero and begin counting again.
The total errors are an accumulation of the individual communication errors listed below.
8.8.20 Bus Activity Rate %
A read indicates the Bus Activity Rate in percent of this Slave’s addressed node versus other
addressed nodes. Range of this value is in hex (0-64), which translates to decimal (0-100%).