User manual

Simatic 505 SoftShop 9 - PID Loops •
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conceived for use when Automatic Download has been configured as
false, but may be used for other purposes. If Automatic Download is
false, a loop is left in manual mode with its output set to Safe Output
when a tuning session has completed. When Automatic Download is true,
a loop is switched back to its previous mode and is assigned its previous
SP on completion.
Previous SP, Previous Output, Previous Gain,
Previous Reset, Previous Rate
You can use these five parameters to record the prior SP, Mn, Kc, Ti, and
Td of a loop before a SmarTune session starts. See Previous Mode for a
short discussion on why they would be configured.
Calculated Gain, Calculated Reset, Calculated Rate
You can use these three variables to record the tuning values calculated
by SmarTune. See Previous Mode for a short discussion on why they
would be configured.
Table 9-4 lists the loop tuning errors written to the Status Variable word.
Table 9-4 Status Code Bit Values
qponmlk
j
ih
g
fwecr
r – reserved (always 0)
c – complete (operation is complete)
e – error (error condition detected)
w – warning (warning condition detected)
f->q meanings dependent on c-e-w bits
x – irrelevant for this condition
rcew fghi jklm nopq Description
0000 xxxx xxxx xxxx SmarTune in progress or not active
0000 0000 0000 0000 Not active
0000 0000 0000 1000 Waiting in SmarTune queue
0000 0000 0001 0000 Waiting for Loop to enter manual
mode
0000 0000 0001 1000 Wait 1 (PV value stabilize)
0000 0000 0010 0000 Wait 2 (PV value stabilize)
0000 0000 0010 1000 Wait 3 (PV value stabilize)
0000 0000 0011 0000 Calculating Tuning Parameters
0100 0000 0000 0000 SmarTune complete with no errors or
warnings
0101 xxxx xxxx xxxx SmarTune complete with warning(s)
0101 xxxx xxxx xx01 Data questionable, tuning may not be
reliable
0101 xxxx xxxx xx10 Data questionable, tuning is not
reliable
0101 xxxx xxx0 01xx Sample interval too large for optimal