－22－
1-5. Hardware error alarm (optional)
Sets whether or not to output an alarm when thyristor failure or circuit
error occurs.
Initial value:
：
Allotted to alarm output 1
：
Alarm not output
Entered by
1-6. Heater break error alarm (optional)
Sets whether or not to output an alarm when heater break occurs.
Initial value:
：
Allotted to alarm output 1
：
Alarm not output
Entered by
1-7: Ramp lower limit
Sets allocation of output ramp limit (base power).
Lower the display to 0.0 when allocating to VR.
Initial value: 0.0 %
：
Key input allocation (range: 0.0 – 99.9)
：
Allocate to VR 1 (below 0.0)
：
Allocate to VR 2
Entered by
Note 1
Both ramp lower limit and ramp higher limit cannot be allocated to VR 1
and VR 2.
For example, if VR 1 is selected for ramp lower limit, only VR 2 can be
selected for ramp higher limit.
If one VR has been selected, the other is automatically selected as well.
To change while higher or lower limit is selected, first cancel VR
allocation and then change.
(VR cannot be selected while using key sequence ‘1-11. Current limiter.’
To allocate to ramp lower limit, cancel allocation of VR of key sequence
‘1-11.’)
Note 2
Ramp lower limit cannot be set higher than ramp higher limit. (Key
setting and VR setting)
Output range is narrowed down by reducing the difference between ramp
lower limit and ramp higher limit, which could produce hunting.
Note 3
Output is not modified by variation limit by changing the ramp lower
limit setting.
1-8: Ramp higher limit option
Sets ramp higher limit option.
Initial value:
：
set value ( 0.1 – 100%)
：
Allocate to VR 1
：
Allocate to VR 2
Entered by
Note 1
Ramp lower limit and ramp higher limiter allocation
cannot be overlapped for VR1 and VR2.
To change allocation, you must first clear the VR allocation.
Note 2
For key setting, ramp higher limit cannot be set below ramp lower
limit. For VR setting, ramp lower limit drops if ramp upper limit is
lower than ramp lower limit.
If the difference between ramp higher limit and ramp lower limit is
small, output range is narrow, and could therefore result in hunting.
Note 3
Output is not modified by variation limit by changing the ramp higher
limit setting.
Note 4
When allocated to VR1/VR2, ramp higher limit would be (VR
amount )*(
set value ). If
is set to 100%, ramp
higher limit would be controlled only by VR1/VR2.
1-9: Ramp higher limit
Sets allocation of ramp higher limit of output (high power).
Initial value: 100%
：
Entered by
Range: 0.1 – 100
(fractional digits below decimal point not displayed for 100%)
Note 1
Both ramp lower limit and ramp higher limit cannot be allocated to VR 1
and VR 2.
For example, if VR 1 is selected for ramp higher limit, only VR 2 can be
selected for ramp lower limit.
If one VR has been selected, the other is automatically selected as well.
To change while higher or lower limit is selected, first cancel VR
allocation and then change.
(VR cannot be selected while using key sequence ‘1-11. Current limiter.’
To allocate to ramp higher limit, cancel allocation of VR of key sequence
‘1-11.’)
Note 2
For key setting, ramp higher limit cannot be set below ramp lower limit.
For VR setting, ramp lower limit drops if ramp higher limit is lower than
ramp lower limit.
Output range is narrowed down by reducing the difference between ramp
lower limit and ramp higher limit, which could produce hunting.
Note 3
Output is not modified by variation limit by changing the ramp higher
limit setting.
1-10. Variation limit
Current may change precipitously if amount of output varies dramatically
while the power is on. A variation limit is provided to control this ramp.
Unit: Seconds
Initial value: 1.0
Entered by
Range: 0.0 – 99.9
The setting value is the time required for output to increase from 0 to 100%.
Summary of Contents for PAC18 Series
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