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Analog Input Functions and Operating Procedures Section 6-6
6-6-3 Peak Value Hold Function
The peak value hold function holds the maximum digital conversion value for
every input (including mean value processing). This function can be used with
analog input. The following diagram shows how digital conversion values are
affected when the peak value hold function is used.
The peak value hold function can be set individually for each input number by
turning on the respective bits (04 to 07) in CIO word n.
For the CIO word addresses, n = CIO 2000 + (unit number x 10).
In the following example, the peak value hold function is in effect for input
number 1, and the unit number is 0.
When mean value processing is used together with the peak value hold func-
tion, the mean value will be held.
As long as the peak value hold function is in effect, the peak value hold will be
held even in the event of a disconnection.
When the load to the CPU Unit is disconnected, the Peak Value Hold Bits (bits
04 to 07 of the word n) are cleared and the peak value hold function is dis-
abled.
Peak value hold
Digital conversion value
t (Time)
Conversion value when
the peak value hold
function is used
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Bit
Input 2
Input 1
Word n
The peak value hold function will be in effect
for the above input numbers while their
respective bits are ON. The conversion
values will be reset when the bits are turned
OFF.
Input 4
Input 3
200004
Input condition
The maximum
conversion
data value is
held for input
number 1.
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