Johnson Controls 300 Series Manual page 9

Network Control Module 300 Series Technical Bulletin
Microprocessor
The microprocessor applies the various supervisory programs to the
combined data, and exercises control over the modules and devices
that connect to the NCM via a local bus.
This supervision and control operate in the same manner when any of
the Standard Functionality program sets (Standard, Fire Management,
Intelligent Access Control, or Operator Terminal) are downloaded.
For Migration Functionality, the microprocessor translates data from
the field gear into compatible code for the target system:
• For S2 Migration, the microprocessor integrates the incoming S2
data into the Metasys system and extends NCM supervisory and
control functions over the objects on the S2 trunk.
•
For JC/85 Gateway, the NCM microprocessor:
- executes commands from the JC/85 headend to objects on the
Metasys software side
- provides attribute information for all objects on the
Metasys software side
- translates and sends Metasys software reports to the
JC/85 devices
• In Network Port applications, the microprocessor:
- translates the host-generated requests to Metasys software
commands
- applies the various supervisory programs to the combined data,
supporting those functions that relate to the mapping of data
objects to the host computer (mapped analog data and binary
data objects)
All the software applications and supervisory routines take place
inside the NCM; database exceptions and historical files are uploaded
to the Operator Workstation (OWS) for reporting and archival
purposes.
80-Pin SIMM Board
This circuit board (Figure 1: Callout 3) provides Read-Only Memory
(ROM) to the NCM. (For the NCM350 or NCM361, Flash memory
replaces the ROM.)
Communications
The I/O subsystem supports a multi-user environment consisting of
network connections (N1, integrated N2, and N2E) and direct I/O
communication (NT or Operator Terminal [OT], and RS-232 ports).
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