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PROFIBUS-DP interface
3–8
1070 066 091-102 (01.08) GB
3.2.3
Velocity control
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)
Bit 0: Drive Halt
drive halt, setpoints are inhibited
setpoints are effective
r r r r r r r r r r r r X X X X
15
0
1
0
X = 0 or 1
r = reserved
2
1
0
1
Bit 1: Drive enable
no drive enable
drive has been enabled
0
1
Bit 2: Drive on
drive off
drive on.
0
1
Bit 3: Reset diagnostics class 1
no effect
reset diagnostics class 1
.
Bits 0, 1 and 2 are high:
Power is connected. The motor is controlled.
D
PROFIBUS status word
(P-0-2801)
Bit 3:
Error has ocurred
r r r X X X r r r r r r X r r r
15
0
1
2
Bit 10:
n
act
= n
set
Bit 11:
n
set
= n
limit
Bit 12:
n
act
= 0
X = 0 or 1
r = reserved
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
act
= n
set
Becomes high as soon as the speed/velocity input value has been
reached according to velocity window P-0-0157.
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01