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Function: Motor Pre-heat (Setting: 60)
In order to prevent condensation on the motor windings, a DC current can be circulated through the windings. The heat produced by the
current in the windings will prevent the moisture from condensation on the wire. Motor pre-heating can only be initiated by closing a
digital input programmed as a Motor Pre-heat input (H1-0x = 60). The level of the DC current used by the Motor Pre-heat function is
determined by parameter b2-09.
A Run input will be given priority over a Motor Pre-heat input. When the Run command is removed, if the Motor Pre-heat input is still
closed, the motor pre-heating will resume.
Function: Speed Search 1 (Setting: 61)
Function: Speed Search 2 (Setting: 62)
Function: Speed Search 3 (Setting: 64)
Setting of b3-01
0
1
2
3
The Speed Search function can be turned on for all starts with parameter b3-01. If, however, it is beneficial to only use Speed Search at
certain starts, a digital input can be programmed to turn on Speed Search only when it is closed.
Speed Search 1 will start searching for the rotor speed from the maximum frequency (E1-04). Speed Search 2 will begin searching for the
rotor speed from the existing Speed Command. Speed Search 3 will cause the motor to baseblock when the switch is open and then
perform Speed Search when it closes.
In all cases the form of Speed Search, Speed Estimation or Current Detection, is determined by the setting of b3-01. If b3-01 = "0:
SpdsrchF Disable," then the Speed Estimation form of Speed Search is used. If b3-01 = "2: SpdsrchI Disable," then the Current Detection
form of Speed Search is used.
Function: Comm Test Mode (Setting: 67)
The iQpump drive has a built-in function for self-diagnosing the serial communications operation. The test involves wiring the send and
receive terminals of the RS-485/422 port together. The iQpump drive transmits data and then confirms the communications are received
normally.
In order to perform the serial communications self-diagnosis, terminal S7 must be programmed as the Comm Test Mode digital input
(H1-05 = "67: Com Test Mode") and then power removed from the iQpump drive and the following steps performed:
1. Wire the S7 and SC terminals of the control circuit terminals together
2. Wire the R+ and S+ terminals of the RS-485/422 port together
3. Wire the R- and S- terminals of the RS-485/422 port together
56
Table 13 Digital Input Functions
Speed Search Method Used for Multi-function inputs
SC
S3
S4
S5
S1
S2
RP
R+
R-
S+
Speed Estimation
Current Detection
S6
S7
S-
YASKAWA TM.iQp.02 iQpump Drive Programming Manual
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