Control Techniques Digitax ST - Page 163

Parameter
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Parameter x.00
Parameter
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Advanced parameter
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Performance
Menu 12
Digitax ST Advanced User Guide 163
Issue Number: 1 www.controltechniques.com
Figure 5-14 Brake sequence
This parameter should be used as a source for a digital output to control an electro-mechanical brake. This parameter is one to release the brake and
zero to apply the brake. Digital I/O can be automatically configured to use this parameter as a source (see Pr 12.41).
0 = dis
The brake controller is disabled and no other drive parameters are affected by the brake controller. When this parameter is changed from a non-zero
value to zero the following parameters are set to zero: Pr 2.03, Pr 6.08, Pr 13.04, Pr 13.10 and Pr 12.49 = 1.
1 = rel
The brake controller is enabled with I/O set up to control the brake via the relay output T41/42. Drive ok is re-routed to digital I/O 2 (T25).
2 = d IO
The brake controller is enabled with I/O set up to control the brake via digital I/O 2 (T25).
3 = User
The brake controller is enabled, but no parameters are set to select the brake output.
The following tables show the automatic parameter changes that occur to set up digital I/O2 (T25) and the relay output (T41/42) after drive reset when
Pr 12.41 has been changed. The changes are done in two stages: the first stage restores the I/O used as defined by the initial setting of Pr 12.41 and
the second stage sets up the I/O as defined by the new setting of Pr 12.41.
12.40 Brake release
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Update rate Background read
12.41
Brake controller enable
Coding Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 3
Default 0
Update rate Read on drive reset
1
243
Pr Speed feedback
3.02
Pr Reference on 1.11
Pr Brake release 12.40
Pr Ramp hold 2.03
Pr Position control mode
13.10
Pr Drive active 10.02
1. Post-brake release delay
2. Wait for speed threshold
3. Wait for brake apply speed delay
4. Brake apply delay
Pr Hold zero speed
6.08
Pr Brake apply speed
12.45
Pr 12.47 Pr 12.46 Pr 12.48