ABB DI621 3BHT300012R1 Control mode reception configuration

Description

The execute mode is the normal mode of operation. In this

mode, the controller communicates with block I/Os, rack I/O

controllers, and other control modules. It executes control

configurations, reads inputs, and updates outputs. The con

troller also processes exception reports, and configuration and

control messages.

Configure

Use the configure mode to enter or modify control strategies.

The controller receives configuration commands over Control

way and changes the data in the NVRAM memory.

NOTE: The process of configuring the controller requires information from at

least two documents. The Function Code Application Manual contains all of

the information needed to design a control strategy. The instruction for the par

ticular configuration tool being used (Composer) explains the steps required to

download control strategies into controller memory.

Error

The controller goes into error mode whenever the built-in sys

tem diagnostics detect a hardware or configuration error. If a

hardware error is detected, the controller halts and displays

the error code using group A LEDs one through eight.

If a configuration error is detected, the controller resets and

enters error mode and displays the error code using group A

LEDs 1-8. Additional information about the configuration

error is available in bytes 3, 4, and 5 of the module status.

Refer to tables 5-6 and 5-7 in Controller Status Summary for

more information.

If an NVRAM error is detected, the status LED flashes, but the

controller continues to operate. This is possible because a

copy of the configuration is held in SDRAM and executed from

there. The next time the controller is reset it will not start up,

but will fail with an NVRAM error.

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