Update Rate - Emerson SP1201 Installation Manual

Safety Product
Introduction
Information information
The drive has three analogue inputs (AI1 to AI3) and two analogue outputs (AO1 and AO2). Each input has a similar parameter structure and each
output has a similar parameter structure. The nominal full scale level for inputs in voltage mode is 9.8V. This ensures that when the input is driven
from a voltage produced from the drive's own 10V supply, the input can reach full scale.
Terminal Input
5/6 AI1
7 AI2
8 AI3
Terminal Output
9 AO1
10 AO2

Update rate

The analogue inputs are sampled every 4ms except where the destinations shown in the table below are chosen, the input is in voltage mode and
other conditions necessary for short cutting are met.
Input destination
Pr 1.36 - Analogue reference
Pr 1.37 - Analogue reference
Pr 3.10 - Power ff comp
Pr 3.19 - Hard speed ref
Pr 4.08 - Torque reference
The window filter applied to analogue input 1 (see Pr 7.26) can be set to a time that is shorter than 4ms. There is no advantage in doing this, as it
simply reduces the resolution of the input data, which is still only sampled and routed to its destination parameter every 4ms.
Analogue outputs are updated every 4ms except when one of the following is the source and high speed update mode is selected. In high speed
mode the output operates in voltage mode, is updated every 250µs, special scaling is used as described in the table and the user scaling is ignored.
Output source
Pr 4.02 - torque prod current
Pr 4.17 - magnetising current
Pr 5.03 - output power
120
System Mechanical
design installation installation
Input modes
Voltage only
(16 bit plus sign as a speed reference)
0 to 6
0 to 9
Output modes Resolution
0 to 3 10 bit plus sign
0 to 3 10 bit plus sign
Regen mode sample rate
AI1 - 4ms
AI2 or 3 - 1ms
10.0V = Rated drive current / 0.45
10.0V = Rated drive current / 0.45
The output is the product of the active current and the voltage component in phase
with the active current (vsy x isy).
10V would be produced when:
Active current = Rated drive current / 0.45
Peak phase voltage in phase with the active current = DC_VOLTAGE_MAX / 2
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Electrical Getting
Optimisation
started
Resolution
12 bit plus sign
10 bit plus sign
10 bit plus sign
Scaling
Technical Component
Parameters
data sizing
Unidrive SP Regen Installation Guide
Diagnostics
Issue Number: 2