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5-19
Continued
n151
: Modbus Time Out Detection
Factory setting: 1
Range: 0 to 4
If time between Modbus messages exceeds 2.0 seconds, the drive will respond
according to the table below. A setting of " 4 " disables this fault condition.
If communications error exists, drive will respond according to the following table:
Setting
Description
0
Coast to Stop (fault)
1
Ramp to Stop using n020 (fault)
2
Ramp to Stop using n022 (fault)
3
Continue Operation (Alarm)
4
Disabled
D.
Loop Test
The GPD 315 has the ability to perform a serial communications self-check, in the form of a loop
test. Use the following steps to perform a loop test.
1.
With power applied to the GPD Drive set parameter n056 = 35.
2.
Remove power from the GPD Drive and wait for the charge light to go off.
3.
Disconnect all wiring terminals R+, R-, S+, S- & S7.
4.
Install the following wires:
connect S+ to R+
connect S- to R-
connect S7 to SC
5.
Apply power to the GPD Drive.
If the GPD Drive displays a normal frequency reference, the loop test was successful.
If the GPD Drive displays “CE” on the digital operator, the loop test failed and the serial
communications hardware is not functioning correctly. Remove power and recheck all of the
above connections. Re-apply power. If the GPD 315 still displays “CE”, the unit will need to be
replaced.
6.
Remove power from the GPD Drive.
7.
Disconnect the wires installed in step 4.
8.
Re-apply power and program n056 to its previous setting. NOTE: the factory setting of
n056 = 10
.
5.14 MODBUS CONTROL
Summary of Contents for GPD 315
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