GEM80-400 1. Introduction
Issue 3 04/99 ALSPA GEM80-400 CONTROLLER TECHNICAL MANUAL Page 1-21
1.12. Specification
Controller Standard 400S and Enhanced
Memory
Capacity
- Up to 1Mbyte of off-line RAM for
data storage, including
512Kbytes for additional video
formats.
Memory support - battery or EPROM
Typical
Instruction
Capacity
20,000 instructions + 30,000 data tables, as standard; this can be
expanded to give 40,000 instructions by fitting optional memory
expansion boards.
NOTE
Early controllers were limited to 16.000 and 36,000 User
Instructions
I/O Capacity Provision for up to 8 Basic
and Verification I/O Module
For 400S version
Provision of up to 4 Fast I/O
modules in.
For Enhanced version.
Provision for up to 4 Basic or
Verification I/O Modules.
Fast I/O - Up to 24 slots are
available for Fast I/O Modules.
Basic I/O Highway providing 16 words (up to 256 points) of I/O.
One Basic I/O and one Verification I/O port for connecting
additional I/O Subracks. Up to 1024 × 16-bit words of Verification
I/O which can be converted to Basic I/O. Remote I/O - See
'Remote I/O Verification User Information Sheet', Publication
No.T463.
Video Not available Video processors - up to 4
IMAGEMs; video memory - 64K
expandable, by the addition of
an 8272 Memory Module, to
544K.
Serial Link
Communicatio
n
Three serial communication ports: Ports 1 & 2: RS485/RS232 ports,
isolated, individually configurable for use as ESP tributary or
control ports, printer/programming ports, or GEMSTART CCU port
. Port 3: RS232 or 20mA port, isolated, used for direct connection
to a printer or a suitable GEM 80 programming tool, such as
Gemesys 3.
Network
Communicatio
n
- GEMLAN-D Network
Communication Ports and
STARNET Communication Ports
are available if these Central
Highway Modules are fitted.
2 FIP Communication Ports (optional).
Program Enhanced GEM 80 Ladder Diagram Language
Execution
Speed
Approximately 1ms per 1000 instructions
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