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4-12 Series 90-30/20/Micro Programmable Controllers Reference Manual – September 1998 GFK-0467K
4
_____
| |
(enable) —|ONDTR|— Q
| |
|0.10s|
| |
(reset) —|R |
| |
| |
(preset value) —|PV |
|_____|
(address)
Parameters:
Parameter Description
address The ONDTR uses three consecutive words (registers) of %R memory to store the
following:
• Current value (CV) = word 1.
• Preset value (PV) = word 2.
• Control word = word 3.
When you enter an ONDTR, you must enter an address for the location of these
three consecutive words (registers) directly below the graphic representing the
function.
Note: Do not use this address with other instructions.
Caution: Overlapping references will result in erratic operation of the timer.
enable When enable receives power flow, the timer’s current value is incremented.
R When R receives power flow, it resets the current value to zero.
PV PV is the value to copy into the timer’s preset value when the timer is enabled or reset.
Q Output Q is energized when the current value is greater than or equal to the
preset value.
time Time increment is in tenths (0.1), hundredths (0.01), or thousandths (0.001) of seconds
for the low bit of the PV preset value.
Valid Memory Types:
Parameter flow %I %Q %M %T %S %G %R %AI %AQ const none
address •
enable •
R •
PV • • • • • • • • • •
Q • •
• Valid reference or place where power may flow through the function.