8.5.2
Measured value inquiry MBO DESOX
TAG / Compo‐
nent
Modbus
address
FC code Length
/ num‐
ber of
regis‐
ters
Format
Value
MV2 / SO2
90
03
2
Float AB CD
MV4 / CO2
132
03
2
Float AB CD
MV5 / ---
MV6 / Pres‐
sure
174
03
2
Float AB CD
MV7 / ---
MV8 / Flow
216
03
2
Float AB CD
MV10 / Ratio
258
03
2
Float AB CD
IV2 / ext.
Standby
277
03
1
Bit by bit
Bit 0 (LSB): 1 ext. Standby active
IV1 (lower 16
bits) / active
measuring
point, conden‐
sate container
full
298
03
1
Bit by bit
Bit 0 (LSB)*: 1 Probe 1 active
Bit 1 *: 1 Probe 2 active
Bit 2 : 1 Condensate container
full
IV1 (upper 16
bits) / NAMUR
Status
299
03
1
Bit by bit
Bit 0 (LSB): 1 Failure
Bit 1: 1 Maintenance request
Bit 2: 1 Function control
Bit 3: 1 Indefinite
Bit 4: 1 Extended
*
Invalid when system in standby
8.5.3
Enabling Modbus inputs
Prerequisites
•
SOPAS ET is connected to the measuring device.
Procedure
1.
Open the BCU module with a double-click.
2.
Open the “Function buttons” menu under “Maintenance”.
3.
Click “Enable MODBUS Ctrl”.
✓
Modbus inputs are activated.
8.5.4
Setting Modbus functions
Activating the Modbus functions
Command
Modbus address
FC code
Format
Value
Enabling Modbus
inputs
1389
16
Float AB CD
Unequal 0.0: Ena‐
ble
Disable 0.0:
OPERATION
8
8021339/1CHC/V1-1/2021-07 | SICK
O P E R A T I N G I N S T R U C T I O N S | MARSIC280
65
Subject to change without notice
