Rockwell Automation 1788-CN2FF ControlNet-to-FOUNDATION Fieldbus H1 Linking Device User Manual - Manual (Page 32)

1788-6.5.1 - January 1999
4-6 Using the ControlNet-to-FOUNDATION Fieldbus H1 Linking Device
The MAO function block has two valid configurations. In the first
configuration the BKCAL_OUT parameter of the AO is not connected back
to the controller. In this case, there is no mode handshake provided by the
upstream controller for cascade initialization of the AO. You connect only
the CN_OUT_A
x parameter from the MAO to the CAS_IN of the AO block
as shown in Figure 4.4. In this case, you must not connect the
BKCAL_OUT parameter of the AO to the BKCAL_IN
n parameter of the
MAO block.
Figure 4.4 Sample Non-Cascade AO Configuration
In the second configuration the controller provides the necessary mode
handshake for cascade initialization of the AO block. In this case, you must
connect CN_OUT_A
x of the MAO block to CAS_IN of the AO block, and
BKCAL_OUT of the AO block to BKCAL_IN_A x of the MAO block, as
shown in Figure 4.5. Note that there is a strict ordering relationship between
CN_OUT_A
x and CN_BKCAL_IN_Ax parameters of the MAO block.
That is, CN_BKCAL_IN_A0 is associated with CN_OUT_A0,
CN_BKCAL_IN_A1 with CN_OUT_A1, and so on.