RKC INSTRUMENT RB100 - Page 161

8. PARAMETER DESCRIPTION
IMR02C15-E4
8-37
Minimum ON/OFF time of proportioning cycle
[heat-side]
Factory default setting:
The screen is displayed.
This is the Minimum ON/OFF time of the time proportioning cycle [heat-side].
Data range Factory set value
0 to 1000 ms 0
Minimum ON/OFF time of proportioning cycle [heat-side] displays when
relay contact output, voltage pulse output, triac output or open collector
output is specified to control output 1 (OUT1).
Minimum ON/OFF time of proportioning cycle [heat-side] is not
displayed when the block selection at F08 [S.F08] (P. 8-83) is set to
“1: No display” in the Engineering mode.
Related parameters
Parameter setting mode: Engineering mode:
• Proportional cycle time • Minimum ON/OFF time of proportioning
[heat-side] (P. 8-36) cycle [heat-side] (P. 8-80)
 Description of function
The Minimum ON/OFF time of the proportioning cycle is used to prevent output ON or OFF when the
output is greater than 0 % or less than 100 %. This is useful when you need to establish a minimum
ON/OFF time to prolong the life of the relay.
Example 1: Setting of Minimum ON/OFF time of proportioning cycle > Computed output
More than 0 % (Around 0 %)
Computed
output
ON
OFF
* When a long minimum ON/OFF time is required for the relay, set a time longer than that time.
ON
OFF
Computed
output
Setting of
Minimum
ON/OFF time
ON
OFF
Proportioning cycle time
(ON time)
*
Less than 100 % (Around 100 %)
Setting of
Minimum
ON/OFF time
ON
OFF
(
OFF time
)
Proportioning cycle time
*
ON
OFF
A
ctual output
ON
OFF
A
ctual output
Example 2: Setting of Minimum ON/OFF time of proportioning cycle ≤ Computed output
More than 0 % (Around 0 %)
* When a long minimum ON/OFF time is required for the relay, set a time longer than that time.
ON
OFF
Computed
output
Proportioning cycle time
Setting of
Minimum
ON/OFF time
ON
OFF
(ON time)
*
Less than 100 % (Around 100 %)
Setting of
Minimum
ON/OFF time
ON
OFF
(
OFF time
)
Proportioning cycle time
*
Computed
output
ON
OFF
ON
OFF
A
ctual output
ON
OFF
A
ctual output
The minimum ON/OFF time of the proportioning cycle becomes invalid when the
Voltage/Current output is selected.
Operation will not take place if “Proportional cycle time < Minimum ON/OFF time of
proportioning cycle.”
MT