11. Appendix D: Sample Use under PL7 PRO
The “Sr0”
•Determine the overall status of the motor starter with: 
in case of triggering (tripped), 
if the
contactor on the motor starter is in the ON position, or 
in all other cases.
•Use the commands generated by buttons 
and 
to set the motor starter in
pause mode (bit 13 of the command word). N.B.: the "pause" mode should not be used for a normal application; you should rather use the FOR , REV and STOP buttons (see below).
•Activate the fault reset command (bit 3 of the command word) if the user pressed the 
button and the fault LED is on: 
. Once this command is on, it is cancelled as soon as the LED goes off: 
.
•Activate the self test command (trip) of the motor starter (bit 5 of the command word) if the user pressed the 
button and the “Tripped” LED is off: 
. Once the command is on, it is cancelled as soon as
the LED goes on: 
.
•Evaluate the value of the motor current, given as a percentage of the IR current value (unit = % FLA). Bits 8 (LSB) to 13 (MSB) of the motor starter status word are extracted and the appropriate unit (.e. 3,125% FLA), is then used to evaluate the current. The maximum value is therefore equal to 63, i.e. 196,875% FLA.
•Use buttons 
, 
and 
exclusively to enable only one of the three following controls at a time, while resetting the other two to zero, in descending priority order: stopping (bit 2 of the command word), run forward (bit 0), and run reverse (bit 1).
11.4. Reading and Writing any TeSys U Motor Starter Parameter
Although the term “PKW” is used in the current example, the service for which an example is described here should not be confused with the PKW service of other products from Schneider Electric. These two services are different but can also be compared due to their main purpose, whih consists in reading/writing the value of any parameter on any Modbus slave.
However, contrarily to the true PKW service, the aperiodic parameter reading/writing service used here does not support the Modbus broadcast feature (i.e. do not ever use address 0 to access all Modbus slaves at the same time!). In addition, the internal settings of the LUFP7 gateway cannot be accessed using this service.
The “PKW Service” operation screen allows the user to issue the reading or the writing of a register on any Modbus slave (mainly one of the 8 TeSys U motor starters from the default configuration). This screen is sub- divided into a number of frames, described and displayed hereafter:
•The first frame, “Slave Address,” is used to select the station the aperiodic parameter reading/writing service will poll. Only one box can be checked at any given time. Depending on the box currently checked when the “SEND command” button is being pushed, the “Slave” field of the reading (MSB of %QW4.0.9) or writing (MSB of %QW4.0.12) command will be updated accordingly. The “Other address:” box allows the user to type in an address ranging from 1 to 247.
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