ACH550 E-Clipse Bypass User’s Manual
2-103
Embedded fieldbus
Communications fault
When using fieldbus control, specify the bypass’ action if external serial
communication is lost.
Feedback from the ABB E-Clipse Bypass – EFB
Pre-defined feedback
Inputs to the controller (bypass outputs) have pre-defined meanings established by
the protocol. This feedback does not require bypass configuration. The following
table lists a sample of feedback data. For a complete listing, see input word/point/
object listings in the technical data for the appropriate protocol.
Note:
With Modbus, any parameter can be accessed using the format: 4 followed by
the parameter number.
Bypass Parameter
Value
Setting
3004
COMM
LOSS
0 (
NOT
SEL
)
1 (
FAULT
)
2 (
CONST
SP
7)
3 (
LAST
SPEED
)
Set for appropriate drive/bypass response.
NOTE: If the system is in bypass mode
when communication is lost, choices 2 and
3 will cause the bypass contactor to remain
in it’s present state.
3005
COMM
FAULT
TIME
Set time delay before acting on a communication loss.
Bypass Parameter
Protocol Reference
Modbus
N2
FLN
BACnet
0101
MOTOR CURR
40101
AI1
6
AV0
Type
Name
Description
N2
FLN
BACnet
DI
System Ready
System is ready to accept start
command (either mode).
BI1
27
BV7
DI
System Enabled
System is enabled to start motor (either
mode).
BI2
34
BV9
DI
System Started
System start enables are made and
start command has been received
(either mode). Motor runs if run enable
is active.
BI3
28
BV1
DI
System Running
Motor is running (either mode).
BI4
23
BV0
DI
Fieldbus Local
System is under fieldbus local control
(either mode).
BI5
36
N/A
DI
Bypass Fault
Bypass is faulted.
BI6
93
BV2
DI
Bypass Alarm
Bypass is alarming.
BI7
86
BV5
DI
Comm Control
System is configured for control in the
comm channel
BI8
37
N/A
DI
Override
Override status
BI9
25
BV13
DI
DI1 Status
Bypass digital input 1 status
BI10
70
BI5
DI
DI2 Status
Bypass digital input 2 status
BI11
71
BI6
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