ABB IMASI13, Инструкция по эксплуатации

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I/O Expander Bus
LED Indicators
The ASI module has two LED indicators, one red and one
green, which show the operating status. The LEDs will:
•
Flash red on power-up.
•
Both LEDs will remain off after passing onboard diagnos-
tics until the ASI module is configured by the controller.
•
Show solid green after the controlling controller downloads
configuration data.
•
Show solid green during normal running.
•
Blink green when the controller that configured the ASI
module enters configure mode from execute mode.
•
Blink green if I/O expander bus communication is lost (if
the controller is removed).
•
Show solid red if a fatal failure of the ASI module occurs.
For example, if power up diagnostics fail.
•
Show solid red for a power fail interrupt (PFI).
I/O Expander Bus
The I/O expander bus is a high-speed, synchronous, parallel
bus. It provides a path between controllers and I/O modules.
The controller sends control functions to the ASI module, and
the ASI module provides input data to the controller. The P2
card edge of the ASI module and controller connect to the bus.
The I/O expander bus is parallel signal lines located on the
module mounting unit backplane. A 12-position dipshunt
placed in a socket on the MMU backplane connects the bus
between the controller and I/O modules. Cable assemblies can
extend the bus to eight module mounting units.
A controller and its I/O modules form a subsystem within a
Harmony control unit (HCU). The I/O expander bus between
control and I/O subsystems must be separated. Leaving a dip-
shunt socket empty or not connecting the module mounting
units with cables separates them.