E2648 series Modbus holding registers (part 3)
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
Addr
Reg / MHR
RW
Description
Supported values (dec)
Default
0x00DB
219
RW
Control logic for relay RE1
0- none
1- relay on at high values
2- relay on at low values
3- relay on at values within the range
4- relay on for the values outside the range
0
0x00DC
220
RW
Control logic for relay RE2
0- none
1- relay on at high values
2- relay on at low values
3- relay on at values within the range
4- relay on for the values outside the range
0
0x00DD
221
RW
LOW setpoint for relay RE1
0...65535 (gas units)
see
Specifications
0x00DE
222
RW
HIGH setpoint for relay RE1
0...65535 (gas units)
see
Specifications
0x00DF
223
RW
LOW setpoint for relay RE2
0...65535 (gas units)
see
Specifications
0x00E0
224
RW
HIGH setpoint for relay RE2
0...65535 (gas units)
see
Specifications
0x00FF
255
RW
Sensor, analog outputs, LED and buzzer
status
bit[0]=0/1 - sensor present/absent, read-only!
bit[1]=0/1 - analog outputs deactivated/activated,
bit[2]= 0/1 - in case the sensor is absent, turn signaling off/on analog output1,
bit[3]=0/1 - in case the sensor is absent, turn on signaling with low current/high current
on analog output1; if bit[2]==0 this bit will be ignored,
bit[4]=0/1 - in case of sensor absent, turn signaling off/on analog output2
bit[5]=0/1 - in case of sensor absent, turn on signaling with low current/high current on
analog output2; if bit[4]==0 this bit will be ignored,
bit[6]=0/1 - current/voltage output detected on output1, read-only!
bit[7]=0/1 - current/voltage output detected on output2, read-only!
bit[8]=0/1 - LED deactivated/activated,
bit[9]=0/1 - buzzer deactivated/activated
bit[10]=0/1 - LED is on/off in normal condition
bit[11]=0/1 - LED and buzzer syncing off/on with RE1
bit[12]=0/1 - LED and buzzer syncing off/on with RE2
user defined
0x0100
256
R
Raw temperature data, °C×100
signed integer, -4000...+8500 (-40,00...+85,00 °C)
0x0101
257
R
Raw gas sensor data
ADC data 0...4095
0x0102
258
R
Measured temperature, °C×100
signed integer, -4000...+12500 (-40,00...+125,00 °C)
0x0103
259
R
Gas concentration, gas units
signed integer, -32000...+32000 (gas units)
0x0105
261
RW
0% value for analog output 1
signed integer, -32000...+32000 (ppm / ‰)
0
0x0106
262
RW
100% value for analog output 1
signed integer, -32000...+32000 (ppm / ‰)
1000
0x0107
263
RW
0% value for analog output 2
signed integer, -32000...+32000 (ppm / ‰)
0
0x0108
264
RW
100% value for analog output 2
signed integer, -32000...+32000 (ppm / ‰)
1000
* - The new value is applied after restart.
** - Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be the
only Modbus instrument in the network. The device will not respond to Master command when addressed by ID 0.
*** - This value is dynamic and not kept in EEPROM after restart
L
1
2
3
4
L
H
L
L
H
H
H
L
1
2
3
4
L
H
L
L
H
H
H
