Spectrasensors OXY5500, Operator'S Manual, Page: 97 / 140

Modbus Communication
OXY5500 Operator’s Manual 4
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11
Table 4-1 Holding registers (Continued)
Register
Name
Address Size
Variable
Type
Description
Write
Access
Subnet Mask 5685 8 Int32 The Subnet Mask. Each
pair of registers holds one
octet of the Address. Refer
to
“Ethernet Subnet
Mask” on page 4-18 for
details. This register will
only be used if register
5675 is set to “0” (DCHP
off).
Yes
Ethernet Port
for Modbus 5693 2 Int32 The Ethernet Port used in
the Modbus Protocol.
(Default: 502) Yes
Ethernet
Modbus ID 5695 2 Int32 The Ethernet Modbus ID
(range: 0-32). Yes
Alarm Relay
High Level 5697 2 Float The High Level which trig-
gers the Level Alarm Relay.
The unit used is the same
as defined in Table 4–14. Yes
Alarm Relay
Level Low 5699 2 Float The Low Level which trig-
gers the Level Alarm Relay.
The unit used is the same
as defined in Table 4–14. Yes
Pressure
Mode 5705 1 Boolean Sets the measurement
mode to either acquisition
via 4-20mA or fixed value
where:
0x00 = fixed value
0x01 = 4-20mA Yes
Measure-
ment Mode 5707 2 Int32 This is a bit-coded register
to configure the measure-
ment mode and to trigger
the measurement start.
•
Bit 0 : Reserved.
• Bit 1 : Read only. Set
when a measurement
is already active.
• Bit 2 : Will perform a
single scan.
Yes
Set Concen-
tration Alarm
Low Level 5709 2 Int32 Enables/disables the Low
Level Alarm of the Concen-
tration Alarm Relay:
0x00: Disable (Low Level is
ignored
0x01: Enable Yes