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SM-Uni Enc Pl
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240 Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 7
The freeze input can take the form of either a 485 signal through the encoder marker simulation output pins or a 24V signal on the freeze 24V input.
The selection of which mode is used is dependent on the value of Pr x.38. The values correspond to the modes as described in the following table.
The default is 1 that corresponds to only the 24V input.
Each time the freeze input on the Solutions Module becomes active the non-marker position (Pr x.29 to Pr x.31) is stored in Pr x.35 to Pr x.37 and the
freeze flag (Pr x.39) is set. The freeze flag is not reset by the module and must be reset by the user. No other freeze conditions will be trapped if the
flag is set.
If a freeze source (24V or RS485) is to be used to freeze more than one SM-Universal Encoder Plus, the freeze must be connected to all the SM-
Universal Encoder Plus in which the freeze is to be latched.
When a freeze occurs on the Solutions Module the main drive position can also be stored if this parameter is set to one. Whenever a SM-Applications
and a SM-Universal Encoder Plus are used, the freeze should be connected to the SM-Universal Encoder Plus and Pr x.40 should be set to allow the
drive and SM-Applications to see the freeze.
When Pr x.40 = 0 freeze occurs on the rising edge of the freeze input. When Pr x.41 = 1 freeze occurs on the falling edge of the freeze input.
x.38 Freeze input mode selection
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11
Default
Open-loop, Closed-loop vector, Servo,
Regen
1
Update rate Background read
Value in Pr x.38 24V input 485 input
0NoNo
1YesNo
2NoYes
3YesYes
x.39 Freeze flag
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default
Open-loop, Closed-loop vector, Servo,
Regen
0
Update rate Level 2 write
x.40 Freeze main drive position
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Default
Open-loop, Closed-loop vector, Servo,
Regen
0
Update rate Background read
x.41 Freeze falling edge select
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default
Open-loop, Closed-loop vector, Servo,
Regen
0
Update rate Background read
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