1.2 Explanation of Relays
1-37
1.2.9 Items Shared by the Timer and Counter
Timer and counter partitioning
Timers and counters share the same area. The partitioning of the area can be changed
to obtain the number of timers or counters needed.
Partition the area by setting system register 5. If the initial number of the counter is
specified, those prior to that point will be timers, and those subsequent to that point will
be counters.
If the same value is set for system register 5 and 6, timers are non−hold types, and
counters are hold types. Normally, the same value should be set for both system
registers.
Value of system register 5
(initial number for counter)
Non-hold
type
Hold type
Default settings for timer and counter
Type Timer Counter
FP2SH/FP10SH T0 to T2999 (3000 points) C3000 to C3071 (72 points)
FP2 T0 to T999 (1000 points) C1000 to C1023 (24 points)
FPΣ,FP−X, FP0R T0 to T1007 (1008 points) C1008 to C1023 (16 points)
FP0, FP−e T0 to T99 (100 points) C100 to C143 (44 points)
Hold type and non−hold type partitioning
The contents of timer contacts, counter contacts, set value areas and elapsed value
areas can be held when the power is turned off or the mode switched from RUN to
PROG., and operation later resumed based on those contents.
In the case of the FP0 C10/C14/C16/C32, and FP−e without clock/calendar function,
the areas which hold their contents when the power is turned off are fixed as shown
below. System register settings 6 to 8 as well as 14 become invalid.
Timer Non−hold type: all points
Counter
Non−hold type
FP0 C10, C14, C16 FP−e: From set value to C139
FP0 C32: From set value to C127
Hold type
FP0 C10, C14, C16 FP−e: C140 to C143
FP0 C32: C128 to C143
For the FP0 T32C/FP0R/FPΣ/FP−X/FP2/FP2SH/FP10SH, and FP−e with
clock/calendar function, system register 6 can be used to specify whether a hold
type or a non−hold type is used. If the beginning of a hold type is specified using a
word number, the contents of timer/counter contacts and set value/elapsed value
areas before that point will be non−hold types, and subsequent the contents of
timer/counter contacts and set value/elapsed value areas will be hold types.
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