ACH550 E-Clipse Bypass User’s Manual 2-191
Embedded fieldbus
Bypass overview
The new mode that is available on the E-Clipse bypass is selected by setting bypass
parameter 16.25 to SYSTEM. With this configuration the drive node is still present
but network commands to start the drive are ignored. Instead, the user should send
start commands to the bypass node. In this mode, a start command will start the
bypass if in bypass mode or start the drive if in drive mode.
In system mode, the profile that controls system logic is always the ABB BYPASS
PROFILE which is sent to the bypass device. The setting of bypass parameter
53.05, PROFILE is only used for reference related control (e.g. ramp control bits)
and for the drive status word. These bits are used when writing to or reading the
drive device.
The following table defines the ABB bypass profile control word. Note that this word
is written to the bypass.
ABB Bypass Profile CONTROL WORD
Bit Name Value Description Comments
0START 1 Start
0Stop
1 RESET 0->1 Reset command Fault reset. Edge sensitive.
Other (no op)
2 RUN_DISABLE 1 Run disabled Inverted Run Enable. The STARTED
status bit may be set even when Run
Enable is missing.
0 Run enable on
3 FBLOCAL_CTL 1 FB Local mode for
control word
requested
Field bus sets these bits to move the
bypass to field bus local control mode
of control word (field bus steals the
control).
0 FB Local mode for
control word not
requested
4 START_DISABLE1 1 Start disabled 1 Inverted Start Enables. When Start
Enable is missing, the drive doesn’t set
STARTED status bit.
0 Start enable 1 on
5 START_DISABLE2 1 Start disabled 2
0 Start enable 2 on
6 START_DISABLE3 1 Start disabled 3
0 Start enable 3 on
7 START_DISABLE4 1 Start disabled 4
0 Start enable 4 on
8 OVERRIDE 1 Override selected This selects override 2 which is
controlled by Group 17.
0 Override not
selected
9 LINK_ON 1 Master is detected
in link
This is not settable from the field bus
but reflects the internal state of the link.
0 Link is down
10...15 Reserved
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