Checkline EMS4 - Manual (Page 12)

12
RS-232 Serial Connection
The Remote Display supports an RS-232 connection to data consumers, such as a computer or PLC. To
connect the Remote Display to an external RS-232 device, use the following procedure:
1.
Find the female RS-232 connector on the rear panel of the Remote Display Mux Box.
2.
Using a shielded RS-232 cable, connect the Mux Box to the external data consumer.
a.
Depending on the device and cable configuration, it may be necessary to use a female-
to-male gender changer. They can be used freely without any impact on the Remote
Display functionality.
3.
Use the following RS-232 settings on the external device to establish communication with the
Remote Display Mux Box.
Speed (baud) 9600
Data Bits 8
Stop Bits 1
Parity None
Flow Control XON/XOFF
4.
Refer to the
Communication Protocol section below for a list of available commands. Many
modern computers use USB ports in lieu of RS-232 ports. The Remote Display can still
communicate to these devices over RS-232 by using a Serial-to-USB converter. There are many
such devices available. When searching, ensure that the device is compatible with the Operating
System version that is being used on the computer.
Communication Protocol
The following list summarizes the serial commands available for exchanging data with the Remote
Display Mux Box. These commands apply to both the RS-232 and PC USB communication modes. Type
e te or return afte o a d.
Command Description
A Print current gauge readings for all channels
N:A
P i t cu e t gauge eadi g fo Cha el N . ex: 1:A for channel 1
D Print data packet* for all channels
N:D
P i t data packet* fo cha el N
R Request a measurement update on all Digimatic channels on Tablet
N:R
Re uest a easu e e t update fo cha el N on Tablet
C Clear gauge measurements for all channels (quadrature only)
N:C
Clea gauge easu e e t fo cha el N (quadrature only)
rstErr Resets global errors
N:pXXX=?
Get the alue of co figu atio pa a ete XXX fo cha el N
N:pXXX=
“et the alue of pa a ete XXX fo cha el N to < e alue>
Save Saves any modified parameters to retentive flash
help Show help text and command list
* Data Packet format: Channel:Reading:Analog Scale:New Data:Max:Min
Note that the Analog Scale field has a maximum value of 1000Note N = channel number