ABB CI855 Analog module industrial system controller

Description

Packaging details: if you need an urgent delivery order, please feel free to contact us, and we will do our best to meet your needs.

Price problem: if you find that other suppliers offer cheaper prices for the same product, we are also willing to provide you with reference prices and give you further discounts.

Clear
The DPM1 reads the input information of the slaves and keeps the outputs of the
slavs in a fail-safe state (“0” output).
Operate
The DPM1 is in the data transfer phase. In cyclic data communication, inputs are
red from the slaves and output information written to the slaves.
The reaction of the system to a fault during the data transfer phase of the DPM1, for
example a failure of a slave, is determined by the “Auto Clear Modus” defined via
the BP flag configuration in the settings tab for CI854/CI854A. If this parameter is
enabled, the DPM1 switches the outputs of all assigned slaves to a fail-safe state the
moment a slave is no longer ready for user data transmission. The DPM1
subsequently switches to the clear state. If this parameter is disabled, the DPM1
retains in the operate state even in the event of a fault and the user can control the
reaction of the system. Please refer also to Settings Tab on page 49.
Sync and Freeze Mode
In addition to the normal cyclic communication between the DPM1 (DP Master
Class 1) and the assigned slaves, a master can send the control commands sync and
freeze via multicast to a group of slaves.
With the sync-command the addressed slaves will freeze the outputs in their current
state. New output values received by the master will be stored while the output
states remain unchanged. The stored output data are not sent to the outputs until the
next sync command is received. The Sync mode is terminated with the “unsync”
command.
In the same way, a freeze command causes the addressed slaves to enter freeze
mode. In this mode, the states of the inputs are frozen at their current value. The
input data are not updated again until the master sends the next freeze command.
Freeze mode is terminated with the “unfreeze” command.
The CI854/CI854A does not support sync and freeze mode