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 SP7)
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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