Toshiba T2N - Manual (Page 148)

1. Overview
User's manual 135
The main functions of the T2N are to store the user program, to execute
the stored user program and to control and monitor the operation/state
of machines/processes which are the result of such execution.
The user program is a series of instructions describing operation
sequences, operation conditions, data processing and the interface with
the operator for achieving the requested machines/processes control. It
is stored in the user program memory. The execution of the user
program is the sequential performance of the processes of reading user
data in which external input/output data and control parameters are
stored, processing the respective instructions and storing the results of
this in the user data memory.
Part 2 described the types of processing which are executed by the T2N
internally, how the user program is executed, and also the internal
configuration of the T2N and the types of functions which the T2N supports
to maintain the machines/processes which are controlled by the T2N in
the correct state. Part 3 describes the required information for creating
user programs, that is to say detailed user data, detail of the input/output
allocation and the programming languages. Also, the user program
configuration in the T2N is described in order.
The following diagram shows the user memory configuration of the T2N. 1.2
User Memory
Configuration
1.1
Aims of Part 3
Main Memory
(EEPROM)
(RAM)
Peripheral Memory
User program
memory
(24K steps)
User program
memory
(24K steps)
User data memory User data memory
(D,RW,T,C)
User data memory
(Expanded)