Yokogawa DAQWORX - Manual (Page 60)

2-30 IM WX103-01E
Reference Functons and TLOG Functons
The functions below are used to retrieve measured values and alarm values. The
functions are not case sensitive. For the format used to specify the <channel>, <alarm
level>, and <manual> see “Channel Numbers,” ” Alarm Level,” and “Manual” in this
section.
Functon Descrpton Example
ch (<channel>) Returns the current value of the specified
channel (see page 2-36) ch(00001)/ch(“Tag”)
prech (<channel>) Returns the previous value of the specified
channel (see page 2-36) prech(00001)/
prech(“Tag”)
alarm (<channel>,
<alarm level>) Returns the alarm value of the specified
channel and specified alarm level;
ON=1, OFF=0 alarm(00001,2)/
alarm(“Tag” 2)
alarm (<channel>) Returns the alarm value of the specified
channel, ON=1, OFF=0 alarm(00001)/
alarm(“Tag”)
alarm() Returns the alarm value of an arbitrary
channel, ON=1, OFF=0
alarm()==1 ?
StartRec() : 0
tlogmax (<channel>) Returns the maximum value of the TLOG
computation of the specified channel tlogmax(00001)/
tlogmax(“Tag”)
tlogmin (<channel>) Returns the minimum value of the TLOG
computation of the specified channel tlogmin(00001)/
tlogmin(“Tag”)
tlogpp (<channel>) Returns the (maximum-minimum) value of the
TLOG computation of the specified channel tlogpp(00001)/
tlogpp(“Tag”)
tlogsum (<channel>) Returns the sum of the TLOG computation
of the specified channel tlogsum(00001)/
tlogsum(“Tag”)
tlogave (<channel>) Returns the average value of the TLOG
computation of the specified channel tlogave(00001)/
tlogave(“Tag”)
ManualDO (<manual>) Returns the values being output on the
specified ManualDO.
ManualDO(1)
ManualAO((<manual>) Returns the values being output on an
arbitrary channel.
ManualAO(1)
*1 The TLOG computation computes the maximum, minimum, maximum-minimum, sum,
and average values of the specified channel.If the TLOG function is present in the equation,
the computation is executed.
*2 The reference function or TLOG function returns NaN in the following cases.
• When the data to be referenced by the CH function or PRECH function does not exist
(when disconnected or immediately after starting the monitor operation)
• When the specified channel does not exist or when the specified alarm level is not 1 or 2.
• When the MX100 returns an INVALID value
*3 Select the behavior taken when the value of the measurement channel is ±Over from the
following:
• Continue the computation as ±Over (behavior when the check box is not selected)
• Continue the computation by setting ±Over to the maximum or minimum value of the
measurement range of the specified channel (see “Notes on Computation” in this section).
The selection is made using the Calculate +Over/-Over as the MAX/MIN value of a range
check box.
2.5 Settng Computatons (Settng the Computaton Channels)