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Version Upgrades for CJ1M CPU Units Section 1-2
1-2 Version Upgrades for CJ1M CPU Units
This section describes the upgrades accompanying unit version 3.0 of the
CJ1M CPU Units.
1-2-1 Improved Functionality of CJ1M CPU Units with Unit Version 3.0
The following improvements have been made in the upgrade from unit version
2.0 to unit version 3.0 of the CJ1M CPU Units. (Version upgrade information
common to CJ Series is not included.)
High Frequency
Calculation with PRV(881)
and PRV2(883)
High-frequency calculation methods have been added to the pulse frequency
calculation methods for PRV(881) (HIGH-SPEED COUNTER PV READ) and
PRV2(883) (PULSE FREQUENCY CONVERT) instructions.
Reading Pulse Output
Frequency with PRV(881)
and PRV2(883)
The PRV(881) (HIGH-SPEED COUNTER PV READ) instruction can be used
to read the pulse output frequency.
1-2-2 Improved Functionality of CJ1M CPU Units with Unit Version 2.0
The following improvements have been made in the upgrade to unit version
2.0 of the CJ1M CPU Units. (Version upgrade information common to CJ
Series is not included.)
Pulse Outputs
S-curve Accelerations/
Decelerations
S-curves can be specified for the acceleration/deceleration rates for Pulse
Output Instructions with accelerations/decelerations (ACC(888), PLS2(883),
and ORG(889)). When there is leeway in the maximum allowable speed, S-
curve accelerations/decelerations will help control shock and vibration by
reducing the initial acceleration rate in comparison with linear accelera-
tion/deceleration.
Expanded Acceleration/
Deceleration Rate Setting
The upper limit of the acceleration/deceleration rate has been increased from
2,000 Hz to 65,535 Hz for Pulse Output Instructions with accelerations/decel-
erations (ACC(888), PLS2(883), and ORG(889)).
Duty Ratios Set in 0.1%
Increments
The duty ratio for PWM(891) can now be set in 0.1% increments. The duty
ratio was set in 1% increments for the previous version.
Wider Range of
Applications for CW/CCW
Limit Inputs
Pulse outputs will stop when the CW/CCW limit input signals (reflected in
A54008, A54009, A54108, and A54109) turn ON. For the previous version,
the CW/CCW limit input signals were used only by ORG(889). With CPU Unit
Ver. 2.0, these signals can now be used with pulse output functions other than
origin searches. A new setting is also available for all functions that use the
CW/CCW limit input signals to specify whether the origin will remain estab-
lished or be undefined when a limit input signal turns ON.
Pulse Inputs
Pulse Frequency
Conversions
The pulse frequency input to high-speed counter 0 can be converted to a rota-
tional speed (r/min) or the PV of the counter can be converted to the total
number of rotations.
High-speed Counters
Count Direction Flag The Count Direction Flag enables monitoring whether the count of the high-
speed counter is currently being incremented or decremented. The count in
the current cycle is compared with the count in the previous cycle to deter-
mine whether it is being incremented or decremented.
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