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PROFIBUS-DP interface
3–8
3.2.3
Velocity control
LSA Control S.L. www.lsa-control.com comercial@lsa-control.com (+34) 960 62 43 01
Features:
D Input of a velocity/speed setpoint via PROFIBUS-DP. No feedback of ac-
tual values to the master.
Function:
The "PROFIBUS control word" (P-0-2800) and the "PROFIBUS status word"
(P-0-2801) are cyclically exchanged between the master and the drive using
the "Data_Exchange" service.
The drive stores the setpoint in parameter S-0-0036.
The following is exchanged cyclically between the master and the drive
using the "Data_Exchange" service in order to control the drive and for spe-
cial status messages of velocity control:
D PROFIBUS control word (P-0-2800)
15
r r r r r r r r r r r r X X X X
Bits 0, 1 and 2 are high:
.
Power is connected. The motor is controlled.
D PROFIBUS status word (P-0-2801)
15
r r r X X X r r r r r r X r r r
Bit 3: Error has ocurred.
Becomes high when the drive has recognized an error situation of
diagnostics class 1. The drive is halted in the best possible way; and
the torque is removed afterwards.
Bit 10:n
= n
act
set
Becomes high as soon as the speed/velocity input value has been
reached according to velocity window P-0-0157.
X = 0 or 1
2
1
0
r = reserved
Bit 0: Drive Halt
drive halt, setpoints are inhibited
0
setpoints are effective
1
Bit 1: Drive enable
no drive enable
0
drive has been enabled
1
Bit 2: Drive on
drive off
0
drive on.
1
Bit 3: Reset diagnostics class 1
no effect
0
reset diagnostics class 1
1
X = 0 or 1
2
1
0
r = reserved
Bit 3: Error has ocurred
n
= n
Bit 10:
act
set
n
= n
Bit 11:
set
limit
n
= 0
Bit 12:
act
1070 066 091-102 (01.08) GB
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