Internet PLC Forum
General => Technical support => Topic started by: TTCSR on March 19, 2014, 07:19:29 AM
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I am setting up a test rig to cycle a switch and want to display it's number of cycles in the millions, however, the values I display are limited. Is there anyway to display numbers in the millions or greater?
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TBASIC integer variables, A..Z are 32-bit signed values and they can represent values from -2,147,483,648 to 2,147,483,647. This is probably enough millions.
The ladder logic COUNTERS are limited to values between 0 and 9999. You can chain multiple COUNTERs together to count to much larger values.
This example uses 3 COUNTERs that each count from 0..999 and as result count from 0..999,999,999.
There are 2 custom functions:
' ResetCntrChain - Initialze COUNTERs and their associated contacts
'
' The Present Value (PV) is set to 0 for all counters. The default (reset) PV of
' a COUNTER is -1. By seting the initial state of the counter to "0" this makes the
' value for each follow this sequence:
'
' 0,1,2,3..999,0,1,2,3...
'
' The ClrIO statements reset the contact associated with each COUNTER.
'
CtrPV[Cntr_0] = 0 : ClrIO Cntr_0
CtrPV[Cntr_1] = 0 : ClrIO Cntr_1
CtrPV[Cntr_2] = 0 : ClrIO Cntr_2
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' DisplayCnt - Custom function to display current accumulated count on LCD
'
' Build 32-bit integer from the PV (present value) of the chain of 3 COUNTERs
'
I = CtrPV[Cntr_2]
I = I * 1000
I = I + CtrPV[Cntr_1]
I = I * 1000
I = I + CtrPV[Cntr_0]
' Display count on LCD
'
SetLCD 1,1, STR$(I,9)
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Gary D.
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That's just AWESOME ;D
Worked perfectly and I am monitoring 8 seperate signals that go up to 999,999,999 each.
Thank you very much!