Parameters
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| Parameter | Parameter | Range of | Default |
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| N_teeth | numeric (int32) | 3 to 255 | none |
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| index_type | string | MISSing EXTRa | none |
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| ch_list | string | 100 - 163 | none |
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Comments • This function can only be linked to the E1538’s first channel. The function works for wheels that have either a missing, or an extra tooth to mark their index position. Figure 14 on page 23 shows a wheel sensed with a variable reluctance sensor (using the VRS input option), but any wheel sensing method is applicable as long as it provides a digital output to the RVEL channel.
•1100, 000 The value read by the algorithm can range from
RPS.
nteethnteeth
•As well as sensing rotational velocity, SENS:FUNC:RVEL provides the reference position to the SOUR:FUNC:RPULse function that generates angular positioned pulses. See page 30 for more information on RPULse.
•<n_teeth> is the number of teeth that the wheel would have if it didn’t have missing or extra teeth. For example, we would set <n_teeth> to 12 for the wheel shown in Figure 14 on page 23, even though with the missing tooth, there are only 11.
•<index_type> can be either of the strings "MISSing", or "EXTRa"
•<ch_list> must be the first channel on the SCP, but can contain more than one channel provided that each channel is on a separate E1538. See following note. The related Error Messages are:
3110, "Channel specified is invalid for RVELocity function.
Note Only one channel on any E1538 SCP can be assigned to the SENS:FUNC:RVEL function, and it must be the first channel on the SCP.
•*RST Condition: SENS:FUNC:COND and INP:POL NORM for all digital SCP channels.
•Send with VXIplug&play Function: hpe14XX_cmd(...)
Usage See “Sense Rotational Velocity” on page 22.
SENSE:FUNC:RVEL 12,MISSING,(@140)
12 toothed wheel with one missing, from channel 40
