SEW Movitrac B, Руководство по эксплуатации

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Operating Instructions – MOVITRAC® B
95
5
Communication and unit profile
Startup
Linking safety-rele-
vant control com-
mands Basically, the control commands
• CONTROLLER INHIBIT
• RAPID STOP / STOP
• STOP
• ENABLE
can be activated simultaneously using the set control signal source, the digital inputs,
and the IPOS
plus®
control program. To link these control functions under safety-relevant
aspects, the individual control commands are prioritized. For enabling the frequency in-
verter, for example, the following figure shows that all three processing blocks (terminal
processing, control word processing, and IPOS
plus®
program) have to generate the en-
able. As soon as one of the three processing blocks triggers a control command of
higher priority (such as
STOP or CONTROLLER INHIBIT ), the higher prioritized com-
mand will become effective.
After switching on the frequency inverter, IPOS
plus®
generally issues the control com-
mand ENABLE so that the drive can be controlled immediately even without the
IPOS
plus®
program.
The digital inputs will generally remain active even if the frequency inverter is controlled
via the process data
(P101 control signal source = RS485/FIELDBUS/SBus) . Safety-rel-
evant functions, such as controller inhibit and enable are equally processed by the ter-
minal strip and the fieldbus. This means the frequency inverter must have first been en-
abled at the terminals to control via fieldbus. All other functions that can be activated via
terminals and the control word, will be processed with an OR function. The following fig-
ure shows the device status depending on the various control signal sources (terminals,
bus, or IPOS
®
control word).
XOR
Enable/stop = 0
Bit 1 = 0
AND
Terminals:
OR
"2"
Unit status
"F"
"1"
Bit 0 = 1
SBus/RS485/fieldbus
OR
Terminals:
BUS:
Bit 2 = 0
BUS:
OR
AND
OR
AND
IPOS control word:
CW/stop = 0
CCW/stop = 0
Bit 0 = 1
Terminals:
IPOS control word:
ERROR
CONTROLLER INHIBIT
STOP
"2"
HOLD
IPOS control word:
TERMINALS:
P101 =
Bit 30 = 1
Controller inhibit= 0
Bit 11 = 1
Ext. error = 0
SBus/RS485/fieldbus
P101 =
Stop = 0
SBus/RS485/fieldbus
P101 =
Bit 1 = 1
00
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