Instruction manual

accQcomm Interface Module
Appendix A Commands, Constants, and Registers
A-3
LD
Configures the LCD Display
Param 1 (0 or 1): Toggles the Instrument 1 display on or off. 1 is on, 0 is off.
Param 2 (0 or 1): Toggles the Instrument 2 display on or off. 1 is on, 0 is off.
Param 3 (0 or 1): Toggles the Instrument 3 display on or off. 1 is on, 0 is off.
Param 4 (0 or 1): Toggles the 4-20 mA analog output display on or off. 1 is
on, 0 is off.
Param 5 (0 or 1): Toggles the Pushed Data display on or off. 1 is on, 0 is off.
NOTE: The system info display is always turned on.
Example —
For a two instrument setup with analog output but no pushed data.
?> LD 1 1 0 1 1 0
MA
Modbus address
Param 1 (Range 1 – 247): The device’s address as a Modbus slave. This is
the same for RTU and ASCII protocols.
MR
Modbus RTU/ASCII toggle
Param 1 (0 or 1): 1 sets the device in Modbus RTU, 0 sets the device for
Modbus ASCII. Modbus should already be selected using the SA com-
mand.
MF
Alternate Modbus on Serial Port F
Param 1 (0 or 1): Enables the device to use MODBUS and analog output
simultaneously. However, the Instrument 2 connection is lost. If MF is used,
SA 1 should also be used to enable analog output.
PE
Poll Ensemble
Param 1 (Range 1 - 3): The instrument to be polled. When a PE command
is issued, the accQcomm will output the full binary data of the last ensemble
received from the instrument over the connection. This may look like “gar-
bage” characters, but can be used by an automated polling program.
RC
Sets one of the two conditions for each
of the eight alarms
NOTE: See programming example in
right column.
Param 1 (Range 1 - 8): The alarm number.
Param 2 (1 or 2): The condition for the given alarm. Each alarm has two
conditions that can be joined by an “AND” or “OR” logical operator. Each
condition must be set separately with different RC commands and the oper-
ator must be specified with RO.
Param 3 (Range 1 – 3): The instrument to which the alarm applies, can be
numerical 1 – 3 or Ins1, Ins2, etc., or Sys for averages and summed flow.
Param 4: The data type that is used in the condition. Can be a string con-
stant such as Flow, Level, Depth, Temperature, etc. or any of the numerical
data type constants listed in Table A-2.
Param 5: A comparator for the data value (parameter 4) and the test value
(parameter 6). Can be any of the following: =, >, <. >=, <=.
Param 6: A test value, entered in internal units for the data type specified in
parameter 4.
Example: Set alert one, condition one, to alarm if Instrument 1 has a veloc-
ity less than 0.
?>RC 1 1 Ins1.Velocity < 0
Table A-1 accQcomm Program Commands (Continued)
Commands and Definitions Functions