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6-1
6: A
LLOCATION
N
UMBERS
Introduction
This chapter describes allocation numbers available for the
OpenNet Controller
CPU module to program basic and
advanced instructions. Special internal relays and special data registers are also described.
The
OpenNet Controller
is programmed using operands such as inputs, outputs, internal relays, timers, counters, shift reg-
isters, data registers, and link registers.
Inputs (I) are relays to receive input signals through the input terminals.
Outputs (Q) are relays to send the processed results of the user program to the output terminals.
Internal relays (M) are relays used in the CPU and cannot be outputted to the output terminals.
Special internal relays (M) are internal relays dedicated to specific functions.
Timers (T) are relays used in the user program, available in 1-sec, 100-msec, 10-msec, and 1-msec timers.
Counters (C) are relays used in the user program, available in adding counters and reversible counters.
Shift registers (R) are registers to shift the data bits according to pulse inputs.
Data registers (D) are registers used to store numerical data. Some of the data registers are dedicated to special functions.
Link registers (L) are registers used for inputting and outputting numerical values to and from functional modules.
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