E2638 series Modbus holding registers (part 2)
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
0x00A2
162 / 40163 RW
Zero adjustment for temperature
data, °C × 100
-32000...+32000 (-320,00...+320,00 °C)
0
0x00A5
165 / 40166 RW
Zero adjustment for gas data, ADC
-32000...+32000 ADC units
0
0x00A6
166 / 40167 RW
Slope adjustment for gas data
1...65535
512
0x00A7
167 / 40168 RW
Change rate limit for gas data,
gas unit / s
1...32000, 0 - no limit
0
0x00A8
168 / 40169 RW
Integrating filter time constant, s
1...32000 (seconds), 0 - no filter
0
0x00C9
201 / 40202 RW
Parameter tied to analog output 1
0 – none
1 – temperature
2 – gas concentration
9 – forced Modbus control, value set in MHR / 40204
2
0x00CA
202 / 40203 RW
Parameter tied to analog output 2
0 – none
1 – temperature
2 – gas concentration
9 – forced Modbus control, value set in MHR / 40205
2
0x00CB
203 / 40204 RW
Forced value for analog output 1***
0...1000 (0,0%...100,0% of output scale)
0
0x00CC
204 / 40205 RW
Forced value for analog output 2***
0...1000 (0,0%...100,0% of output scale)
0
0x00D3
211 / 40212 RW
Parameter tied to relay RE1
0 – none
1 – temperature
2 – gas concentration
9 – control by Modbus control, state set in MHR / 40214
2
0x00D4
212 / 40213 RW
Parameter tied to relay RE2
0 – none
1 – temperature
2 – gas concentration
9 – control by Modbus control, state set in MHR / 40215
2
0x00D5
213 / 40214 RW
Forced state for relay RE1***
0 – off, 1 – on
0
0x00D6
214/ 40215 RW
Forced state for relay RE2***
0 – off, 1 – on
0
0x00D7
215 / 40216 RW
Switching delay for relay RE1
0...1000 (s)
0
0x00D8
216 / 40217 RW
Switching delay for relay RE2
0...1000 (s)
0
0x00D9
217 / 40218 RW
Minimal on/off time for relay RE1
0...1000 (s)
0
0x00DA
218 / 40219 RW
Minimal on/off time for relay RE2
0...1000 (s)
0
* – 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
