ACH550 E-Clipse Bypass User’s Manual
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Embedded fieldbus
Communication setup – EFB
The addition of serial communications to the ABB E-Clipse bypass system is done
by bringing the network connection to the bypass and using the bypass software to
direct messages either to the drive or to the bypass control software. The user
makes no connection to the drive fieldbus terminals since this channel is reserved
for the bypass control interface to the drive.
For all EFB Protocols, the drive is viewed as one node and the bypass is viewed as
a separate node. This is illustrated in Figure 1.
Figure 1 - Communications physical and logical connections
Setup of the drive logical connection is done in parameter Group 53 on the bypass
keypad. This group contains, among other things, the Drive MAC ID. Group 53 on
the drive must not be modified from the settings defined by the drive application
macro, 15 (Eclipse Bypass) since this will render the Internal MODBUS Interface
inoperable. Also, drive parameter 98.02, Protocol Sel must not be changed since
this will also render the Internal MODBUS Interface inoperable.
Selection of the EFB protocol is done in bypass parameter 98.02. Setup of the
bypass logical connection is done in parameter Group 50 on the bypass keypad.
Certain parameters that control the network link are duplicated in Group 50 and
Group 53 (e.g. BAUD RATE) and are presented as read only in Group 50.
The user can use bypass parameter 16.25, COMM CTRL to determine if control
signals (start and enables) go to the drive or to the system. Parameter 16.25 = 0
(DRIVE ONLY) is intended for legacy applications where the network was only able
to control the drive. Parameter 16.25 = 1 (SYSTEM) provides new functionality
where control signals control both the drive and bypass depending on the the drive/
bypass mode selected on the bypass keypad. In both cases, non-control related
points are visible on the bypass.
Summary of Contents for ACH550-BCR
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Page 398: ...2 52 ACH550 E Clipse Bypass User s Manual Bypass functions overview ...
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