ABB AC 800F Mounting And Installation Instructions Manual page 364

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ROM
ROM BIOS
Router
Routine check test
RS232C interface
RS422 interface
RS485 cable
RS485 interface
Run/Stop LED
Run/Stop switch
*)
Component of the Freelance 2000 System
Read Only Memory
Data is already stored in a ROM during chip manufacturing. ROMs are
neither erasable nor re-programmable. They are used for applications
requiring lots of pre-programmed memory chips.
→ EEPROM.
Read Only Memory Basic Input Output System
Basic software of a PC containing the basic input/output routines as well
as other basic functions. Stored in a mask-programmed ROM on the
CPU board of the PC central unit.
Network unit packing datagrams using different transmission protocols
and selecting the proper route between the source system and the target
systems. Used wherever networks of different types are linked to each
other.
Test for checking the voltage separation of the modules during the final
quality control of manufacturing, In this test, the insulating property is
checked with a high-voltage tester.
Serial interface of the serial fieldbus module FI 820F of the AC 800F or of
the CPU module of the process station and of the AC 800F power supply
module. The RS232C interface of the process station CPU module and of
the AC 800F power supply module is reserved for diagnosis.
→ Diagnostic interface
Serial interface on the serial fieldbus module FI 820F of the AC 800F, in
accordance with EIA standard RS422. Two wire pairs are used for
RS422 transmission – one for transmit and one for receive data.
Network cable linking subsystems with the AC 800F.
Serial interface of the serial fieldbus module FI 820F of the AC 800F, in
accordance with the EIA standard RS485. Used as half-duplex link with
one wire pair. Currently, the Modbus protocol is implemented on this
interface.
Bicolor (red/green) LED. Indicates if functional sequence processing is
running or has been stopped.
Remains always off (dark) on the Secondary, and temporarily (until
functional processing is started again) on the Primary. → Run/Stop
switch
Stops functional sequence processing of the AC 800F when set to the
Stop position. Processing stop is indicated by the Run/Stop LED.
Ethernet communication with the operator or engineering station is still
possible, even when the AC 800F is in the Stop state. The AC 800F can
also be stopped from the engineering station, independent of the
Run/Stop switch. If, however, the Run/Stop switch is in Stop position, the
AC 800F cannot be restarted from the engineering station.
Glossary
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