Control Techniques Digitax ST Advanced User's Manual page 163

Parameter Keypad and
Parameter x.00
structure display
Figure 5-14 Brake sequence
1
Pr 12.47
1. Post-brake release delay
2. Wait for speed threshold
3. Wait for brake apply speed delay
4. Brake apply delay
12.40 Brake release
Bit SP
Coding
1
Update rate Background read
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).
12.41 Brake controller enable
Coding Bit SP
Range 0 to 3
Default 0
Update rate Read on drive reset
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.
Digitax ST Advanced User Guide
Issue Number: 1
Parameter
description format
Pr
2
Pr 12.46
FI DE Txt VM DP ND
1
FI DE Txt VM DP ND
1
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Advanced parameter Serial comms
descriptions protocol
12.45 Brake apply speed
Pr 3.02
Pr 10.02
Pr 1.11
Pr 12.40
Pr 2.03
Pr 13.10
Pr 6.08 Hold zero speed
3 4
Pr 12.48
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
Electronic
Performance
nameplate
Speed feedback
Drive active
Reference on
Brake release
Ramp hold
Position control mode
PS
PS
1
Menu 12
163