Omron SYSMAC C200H-CT001-V1, Operation Manual

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4
1-4 Operating Modes
The Counter Unit can be operated in any one of the six operating modes de-
scribed below. External outputs are available in only 3 modes: linear, circular,
and preset. The function of these outputs depends on the mode. (The mode is
selected using the mode selector on the front panel of the Counter Unit, as de-
scribed in 2-1 Switch Settings.) The following is merely an introduction to the op-
erating modes, all of which are covered in detail in Section 4 Data Allocation and
Operating Modes.
Linear Mode In linear mode, the counter value is incremented and decremented between
–8,388,608 and 8,388,607 and is continually compared with preset ranges.
When the counter value is within a range (or ranges), specified outputs are
turned ON. The same output may be specified for one or more overlapping
ranges, in which case the output will be turned ON whenever the counter value is
within one or more of the ranges.
A maximum of 16 ranges may be specified, each with upper and lower limits.
These limits must be within the counter range, i.e., between –8,388,608 and
8,388,607. Data can be transferred from the PC to change range limits or to set
the present counter value as desired.
Circular Mode In circular mode, the counter value restarts from zero after reaching a preset
maximum value or returns to the preset maximum value when the counter
value is decremented past zero. In all other respects, including data transfer,
circular mode functions exactly as the linear mode. The preset maximum val-
ue must be between 0 and 65,535.
Preset Mode In preset mode, the counter value is normally decremented from a preset
value (between 1 and 8,388,607) to zero, although it can also be increm-
ented. During this decrement phase, a total of 3 outputs may be switched ON
and OFF according to ON/OFF counter values. When the counter value
reaches zero, a total of 4 outputs may be turned ON, either indefinitely or for
a preset time, T. Data can be transferred from the PC to change ON/OFF
counter values as desired.
Gate Mode Two types of gate mode operation are available on the C200H-CT002: nor-
mal and cumulative. Only the normal type is available on the C200H-
CT001-V1. In normal gate mode, pulses are counted while control input IN1
(the count signal) is ON. The counter value is retained when input IN1 goes
OFF until input IN1 goes ON again, at which point counting restarts from
zero. In the cumulative type, control input IN1 serves as the reset signal and
counting continues while control input IN2 (the count signal) is ON. Each time
input IN2 is turned ON, counting continues from the current counter value
until it is reset to zero by input IN1. In either type of gate mode, the counting
range is between –8,388,608 and 8,388,607 and counting may be in either
direction. This mode does not support data transfer or external outputs from
the Counter Unit.
Latch Mode In latch mode, counting begins from zero when control input IN1 (count sig-
nal) is turned ON and ranges between –8,388,608 and 8,388,607. Pulses are
counted continuously (regardless of whether input IN1 is ON or OFF) , but
the current counter value is always the counter value latched the last time
control input IN2 (the latch signal) was turned ON, i.e., the current counter
value remains unchanged while the latch signal (control input IN2) is ON and
is updated to the actual count while the latch signal is OFF. Counting may be
restarted from zero at any time be activating control input IN1. Control inputs
Operating Modes
Section 1-4