
Reference Functions and TLOG Functions
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.
Function Description 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 INV
ALID 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 Setting Computations (Setting the Computation Channels)
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