Page 4–148
DURApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Chapter 4: AC Drive Parameters
P6.39~P6.44 Settings Summary for P6.39~P6.44 for PTC and RTD (PT100) Operation
Explanation for P6.39~P6.44:
P6.43 = 0 enables PTC protection and disables both RTD level alarms. If P6.43>0 and the PT100
goes above Level 1, the drive output will drop to P6.43 after the delay time. If the PT100 level goes
above Level 2, the drive will fault according to the setting of P6.39.
P6.39 changes behavior for PTC faults and for Level 2 PT100 faults; P6.39 does not affect Level 1
PT100 warnings.
P6.44 Delay only affects the Level 1 PT100 fault. Level 2 fault is instant.
PTC and RTD (Resistance Temperature Detector) Operation
The PTC/RTD (voltage) input can come into AI1, AI2, or AI3. Whichever input is selected, it must
be switched and selected for 0~10V input. AO2 will provide the fixed excitation current. (See next
page for wiring info.)
1) Choose only one of the one of the following analog voltage inputs to configure for the PTC
or RTD (PT100) input:
a) AI1: Place SW3 on the terminal board to the 0~10V position (sets AI1 = 0~10V input).
i) P4.02=6 (AI1 Function = PTC input).
OR
P4.02=11 (AI1 Function = RTD PT100 input).
ii) P4.05=0 (AI1 I/V Selection = 0~10V).
OR
b) AI2: Place SW4 on the terminal board to the 0~10V position (sets AI2 = 0~10V input).
i) P4.03=6 (AI2 Function = PTC input).
OR
P4.03=11 (AI2 Function = RTD PT100 input).
ii) P4.06=0 (AI2 I/V Selection = 0~10V).
OR
c) AI3: AI3 is 0~10V only, so no hardware switch requires setting.
i) P4.04=06 (AI3 Function = PT100 input).
OR
P4.04=11 (AI3 Function = RTD PT100 input)
2) Set P4.54=13 (AO2 to constant current output). Switch SW2 to 0~20mA/4~20mA on the I/O
control terminal block (sets AO2 to 0~20mA/4~20mA).
3) Set P4.57 = 0. This sets AO2 to use 0~20mA output (instead of 4~20mA).
4) P4.61 is for adjusting the constant voltage or constant current of AO2. Set constant current
output to 9mA by setting P4.61=45. The AO2 constant output current is 20mA x 45% = 9mA.
This is the recommended setting for PTC or RTD(PT100) use. Any effect of RTD self-heating
at the 9mA excitation level will be insignificant.
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