Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 223)

Publication 900-UM007D-EN-E - January 2011
Parameter Adjustments & Application Considerations 4-87
Counting Control Output
ON/OFF Operations Control Output ON/OFF Count Function
With Control Output 1 and 2 ON/OFF outputs (relay outputs or voltage
outputs for driving SSR), the number of times that a control output turns ON
and OFF can be counted. Based on the control output ON/OFF count alarm
configured value, an alarm can be output and an error can be displayed if the
configured count value is exceeded.
The default configuration of the Control Output ON/OFF Alarm Setting
parameter is 0. ON/OFF operations are not counted when this parameter is
configured to 0. To enable counting ON/OFF operations, change the
configuration to a value other than 0.
Control Output ON/OFF Counter Monitor Function
This function is not displayed when the Control Output 1 ON/OFF Alarm
Setting and the Control Output 2 ON/OFF Alarm Setting parameter are set
to 0, or when the control outputs are set for linear (analog) outputs.
Display When ON/OFF Count Alarm Occurs
When an ON/OFF count alarm occurs, the PV display in the No. 1 display
shown below alternates with the
ralm display on the No. 2 display.
• PV
• PV/SP (Including the items displayed by setting the “PV/SP” Display
Screen Selection parameter.)
• PV/Manual MV, PV/SP/Manual MV
• PV/SP displayed for the monitor/setting items
Control Output ON/OFF Count Alarm Function
If the ON/OFF counter exceeds the control output ON/OFF count alarm
configured value, an ON/OFF count alarm will occur. The alarm status can be
assigned to a control output or an auxiliary output, or it can be displayed at the
Table 4.AN
Parameter Name Configurable Range Unit Default
Control Output 1 ON/OFF Count
Monitor 0 to 9999 100 times 0
Control Output 2 ON/OFF Count
Monitor (900-TC8 & 900-TC16) 0 to 9999 100 times 0
PV/SP
25
100
25
ralm 100
C C
Normal ON/OFF Count Alarm
Alternating
display