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11.3.4 Mechanical brake control
Communication information
The four brake-related menus [33C] to [33F] can be
used to control mechanical brakes.
Modbus Instance no/DeviceNet no:
43112
Profibus slot/index
169/16
Brake Release Time [33C]
Fieldbus format
Long, 1=0.01 s
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.
Modbus format
EInt
0.00 s
Range:
0.00–3.00 s
n
• 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 function start speed [33D].
33C Brk Release
Stp A
0.00s
Default:
Fig. 58 shows the relation between the Brake functions.
Brake release
time [33C]
Brake wait
time [33F]
Brake engage
time [33E]
Start
Release Speed [33D]
t
Mechanical
Brake
Brake Relay
Output
Open
Closed
On
Off
Action must take place within
these time intervals
Release Speed [33D]
Fig. 58 Brake Output functions
NOTE: This function is designed to operate a mechanical
brake via the digital outputs or relays (set to brake
function) controlling a mechanical brake.
Omron SX inverter manual
G 06 16
The release speed only operates with the brake function: brake release [33C]. The release speed is the initial speed reference during the brake release time.
Functional Description
33D Release Spd
Stp A
0rpm
91