Emerson SI-PROFIBUS

Unidrive M SI-PROFIBUS User Guide 57
Issue Number: 3
Safety
information
Introduction
Mechanical
installation
Electrical
installation
Getting
started
Parameters
GSD
Files
Cyclic data
Non-cyclic
data
Control and
status words
Diagnostics
PROFIdrive
profile (V4)
Advanced
features
Legacy
features
Glossary of
terms
Index
10.3 Status word
The SI-PROFIBUS status word consists of sixteen control bits some of which are
reserved. See Table 10.3 for the individual bit function descriptions.
Table 10.3 Status word bit definitions
The fieldbus status word is mapped directly from the drive status word, Pr 10.040.
Pr 10.040 is generated by the values of several individual drive status bits; Table 10.4
shows the function indicated by each bit in the status word when set to 1.
13 RESET
A 0-1 transition of the RESET bit will reset the drive from a trip
condition. If the reason for the trip is still present, or another fault
condition has been detected, the drive will immediately trip again.
When resetting the drive, it is recommended to check the status word
to ensure that the reset was successful, before attempting to re-start
the drive.
14
KEYPAD
WDOG
This watchdog is provided for an external keypad or other devices
where a break in the communication link must be detected. The
watchdog system can be enabled and/or serviced if this bit is
changed from zero to one while the control word enabled.
Once the watchdog is enabled it must be serviced at least once every
second or an SCL trip will occur. The watchdog is disabled when an
SLC trip occurs, and so it must be re-enabled when the trip is reset.
15 Reserved
Bit Function Description
b15 b14 b13 b12 b11 b10 b9 b8
(Not
used)
Supply
loss
Reverse
direction
running
Reverse
direction
comman
ded
Brake
resistor
alarm
Braking
IGBT
active
Regener
ating
Current
limit
active
b7 b6 b5 b4 b3 b2 b1 b0
Rated
load
reached
Above
set
speed
At set
speed
Below set
speed
Running
at or
below
minimum
speed
Zero
speed
Drive
active
Drive
OK/
healthy