Modbus protocol – Hach-Lange SC 100 User Manual
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Modbus Protocol
Setup/Relay 1/Timer
Hold Type
40083
Unsigned
Integer
1
R/W
Sets which Sensor outputs are affected
during timer on time (0 = None;
2 = Selected Sensor; 13 = All Sensors)
Setup/Relay 1/Timer
Sensor Select
40084
Unsigned
Integer
1
R/W
Selects which Sensor outputs are being
held/transferred during the timers on time
(this is used when Hold type is set for
single Sensor)
Setup/Relay 1/Timer
Hold Mode
40085
Unsigned
Integer
1
R/W
Selects hold outputs vs. set transfer value
during timers on time
Setup/Relay 1/Timer
Duration Time
40086
Unsigned
Integer
1
R/W
Sets the timer on duration time (sec)
Setup/Relay 1/Timer
Period Time
40087
Unsigned
Integer
1
R/W
Sets the period between timer on events
(mins)
Setup/Relay 1/Timer
Off Delay
40088
Unsigned
Integer
1
R/W
Sets the time the affected Sensor outputs
are held/transferred after the timer turns
off (sec)
Setup/Relay 1/Status
Level
40089
Unsigned
Integer
1
R/W
Sets the status level which will trigger the
relay
Setup/Relay 2
Source
40090
Unsigned
Integer
1
R/W
Selects data source for this relay
(0 = None; 1 = Real Time Clock;
2 = Sensor; 4 = Calculation)
Setup/Relay 2
Sensor Select
40091
Unsigned
Integer
1
R/W
Selects Sensor source when Source
= Sensor (0 = Sensor1; 1 = Sensor2)
Setup/Relay 2
Measurement
Select
40092
Unsigned
Integer
1
R/W
Selects measurement on the Sensor
(0 = Meas1 .. 3 = Meas4)
Setup/Relay 2
Type
40093
Unsigned
Integer
1
R/W
Selects the relay type (0 = Alarm; 1 =
Control; 2 = Status; 3 = Timer; 4 = Event)
Setup/Relay 2
Transfer
Setting
40094
Unsigned
Integer
1
R/W
Selects the transfer value for the relays
(0 = De-energized; 1 = Energized)
Setup/Relay 2/Alarm
High Alarm
40095
Float
2
R/W
Sets the high alarm setpoint
Setup/Relay 2/Alarm
Low Alarm
40097
Float
2
R/W
Sets the low alarm setpoint
Setup/Relay 2/Alarm
High
Deadband
40099
Float
2
R/W
Sets the high alarm deadband
Setup/Relay 2/Alarm
Low
Deadband
40101
Float
2
R/W
Sets the low alarm deadband
Setup/Relay 2/Alarm
On Delay
40103
Unsigned
Integer
1
R/W
Sets the on delay time
Setup/Relay 2/Alarm
Off Delay
40104
Unsigned
Integer
1
R/W
Sets the off delay time
Setup/Relay 2/Control
Setpoint
40105
Float
2
R/W
Sets the controller setpoint
Setup/Relay 2/Control
Phase
40107
Unsigned
Integer
1
R/W
Sets the controller phase
(0 = Low; 1 = High)
Setup/Relay 2/Control
Deadband
40108
Float
2
R/W
Sets the controller deadband
Setup/Relay 2/Control
Overfeed
Timer
40110
Unsigned
Integer
1
R/W
Sets the overfeed timer value (mins)
Setup/Relay 2/Control
On Delay
40111
Unsigned
Integer
1
R/W
Sets the on delay time (sec)
Setup/Relay 2/Control
Off Delay
40112
Unsigned
Integer
1
R/W
Sets the off delay time (sec)
Table 9: sc100 Modbus Registers (continued)
Group Name
Tag Name
Register # Data Type
Length
R/W
Description