TECO F33 Series, Instruction Manual, Page: 97 / 192

94 Functional Description
11.3.4 Mechanical brake control
The four brake-related menus [33C] to [33F] can be
used to control mechanical brakes.
Brake Release Time [33C]
The Brake Release Time sets the time the VSD delays
before ramping up to whatever final reference value is
selected. During this time a predefined speed can be
generated to hold the load where after the mechanical
brake finally releases. This speed can be selected at
Release Speed, [33D]. Immediate after the brake
release time expiration the brake lift signal is set. The
user can set a digital output or relay to the function
Brake. This output or relay can control the mechanical
brake.
Communication information
Fig. 80 shows the relation between the four Brake func-
tions.
• Brake Release Time [33C]
• Start Speed [33D]
• Brake Engage Time [33E]
• Brake Wait Time [33F]
The correct time setting depends on the maximum load
and the properties of the mechanical brake. During the
brake release time it is possible to apply extra holding
torque by setting a start speed reference with the func-
tion start speed [33D].
Fig. 80 Brake Output functions
Release Speed [33D]
The release speed only operates with the brake func-
tion: brake release [33C]. The release speed is the ini-
tial speed reference during the brake release time.
Default: 0.00 s
Range: 0.00–3.00 s
33C Brk Release
Stp 0.00s
A
Modbus Instance no/DeviceNet no: 43112
Profibus slot/index 169/16
Fieldbus format Long, 1=0.01 s
Modbus format EInt
G 06 16
n
t
Release Speed [33D]
Mechanical
Brake
Brake Relay
Output
Action must take place within
these time intervals
Brake release
time [33C] Brake engage
time [33E] Brake wait
time [33F]
Closed
On
Off
Open
Start
NOTE: This function is designed to operate a mechanical
brake via the digital outputs or relays (set to brake
function) controlling a mechanical brake.
Default: 0 rpm
Range: - 4x Sync. Speed to 4x Sync.
33D Release Spd
Stp 0rpm
A