Lighthouse Remote 2014P, Operating Manual

Page: 59 / 80

MODBUS Register Map v1.48
248083408-1 Rev 1 A-7
Device Status
The Device Status register (40003) displays the current status of the
device.
Command
Register
The Command Register (40002) is used to make the device perform an
action. The register performs an action when an integer value is written
to it. The action is completed when the device sends a MODBUS
response. When this register is read, it always returns a zero.
Table A-6 Device Status
Bit Description
0
RUNNING:
Set when a start command is executed remotely via
Command 9 (manual start) or Command 11 (instrument start) or
through the user interface. The flag will remained set until a stop
command is executed.
1
SAMPLING:
This is set only when the instrument is actually
sampling data that is to be recorded. Caution must be used in sending
a command during this time that may invalidate current sample.
2
NEW DATA:
Set to 1 to indicate that a new data record has been
recorded and it hasn't been read via modbus yet. When a data record
has been read via modbus (registers 30001 to 30999), then this flag is
reset to zero.
3
DEVICE ERROR:
In the event that there is a failure on the device,
this bit is set to indicate possible invalid data collected. An example
of a device error could be a positioning error on a manifold device.
Table A-7 Command Register
Value Action
1 Saves all writable 4xxxx register values to the device’s EEPROM.
2 Reserved for future use.
3 Clears the Data Buffer. Record count is set to zero.
4 Saves the instrument parameters in the 40xxx registers to the EEPROM.
Parameters include Sample Time, Hold Time, and Initial Delay.
5 Enable Remote Control. Locks out the instrument’s user interface. Can only
change instrument parameters via MODBUS.
6 Enable Local Control. Unlocks the instrument’s user interface. Instrument
changes can be made at the device itself or through MODBUS.
7 Turns local pump on, if applicable. Flow is regulated by an internal setpoint.
8 Stop pump, if applicable.