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Register
address
Relative
address
(hex)
Register name
Read (R) or
Write (W)
Data
type
Data contents
b1: Maintenance mode 2 (0:OFF/1:ON)
b0: Maintenance mode 1 (0:OFF/1:ON)
Response example: When AL1 and AL2
activate while in MNT2,
Status byte 1: 0x03 (high-order byte of
word data)
Status byte 2: 0x02 (low-order byte of
word data)
41039
40E
Current value
(gas
concentration)
R
Word
Read current gas concentration value
Response example 1: 0x000A when the
gas concentration is 10%.
Response example 2: 0x0005 with 1
being assigned to bit7 of status byte 1,
when gas concentration is –5%
41040
40F
F.S. code
R
Word
Read F.S. code
F.S. code is returned in hex
Response example: 0x0065 when F.S.
code is 101
Master will then convert received code
to F.S. value by referring to full scale
code table (refer to 7.5 Full Scale
Codes)
41284
503
Modbus setting
change permit
R/W
Word
Permission for Modbus setting change
41291
50A
Dynamic IP
address
(high-order)
R
Word
Read currently-set IP address
(high-order)
Dynamic IP address (high-order)
assigned to DHCP
41292
50B
Dynamic IP
address
(low-order)
R
Word
Read currently-set IP address
(low-order)
Dynamic IP address (low-order)
assigned to DHCP
41293
50C
DHCP subnet
mask (high-order)
R
Word
Read currently-set subnet mask
(high-order), which is assigned to DHCP
41294
50D
DHCP subnet
mask (low-order)
R
Word
Read currently-set subnet mask
(low-order), which is assigned to DHCP
41295
50E
DHCP default
gateway
(high-order)
R
Word
Read currently-set default gateway
(high-order), which is assigned to DHCP
41296
50F
DHCP default
gateway
(low-order)
R
Word
Read currently-set default gateway
(low-order), which is assigned to DHCP
41297
510
TCP/IP port No.
R
Word
Read TCP port number
Example: 0x01F6 when Modbus/TCP
port No. is 502 (static)
41298
511
Static IP address
R
Word
Read 1st and 2nd values of static IP
