Yokogawa DR240 - Manual (Page 78)

4-2 IM DR231-01E
AUTO Mode for the Main Display
• Channel No.
The first seven characters are used. The first three characters are used to display the channel
number. The first character always displays “0”. “A” will be displayed in the case of optional
computation channels.
If you selected TAG at the channel No./TAG setting in the set-up mode (refer to 10.2 on page
10-4), the assigned tag will appear for each channel.
• The first 7 characters of the TAG setting will be displayed;
• If the TAG setting consists of only spaces, the channel number will be displayed instead;
• If the first character of the TAG setting is a space, the 2nd to 8th character will be displayed.
• Difference between Channels (delta)
One character is used to let you know that difference between channels (delta) is displayed.
However, it will not be displayed in the case of optional computation channels.
Only if you selected the difference between channels (delta) as the input type, “d” will be
displayed here.
• Alarms
Two characters are used for displaying alarms. One characters is used in the case of optional
computation channels.
When an alarm occurs, the kind of alarm will be displayed. When in one channel several alarms
occur at the same time, the priority of display becomes H > L > dH > dL > RH > RL. For
details on H, L, dH, dL, RH and RL alarms, refer to page 8-2.
• Measurement Values
Seven characters are used for displaying the measurement values. The decimal point uses up
one character. Nine characters is used in the case of optional computation channels.
When a measurement value does not reach the following value, “–
*****
” will be displayed.
• DC voltage: a minimum value of the measuring range – (max. value – min. value) × 0.05
• TC/RTD: min. value of the measurement range –10
°C
• Linear scaling: –32000, or a minimum value of the recording span – (max. value – min.
value)
× 0.05
When a measurement value exceeds the following value, “+
*****
” will be displayed.
• DC voltage: a maximum value of the measuring range + (max. value – min. value)
× 0.05
• TC/RTD: min. value of the measurement range +10
°C
• Linear scaling: +32000, or a maximum value of the recording span + (max. value – min.
value) × 0.05
If the input module is not connected properly, “ XXXXXX” will be displayed.
While waiting for an input signal “ OOOOOO” will be displayed.
• Engineering Units
If the channel number has been selected to appear on the display, six characters are used for
displaying engineering units. If TAG has been selected to appear on the display, only three
characters are used for displaying units. Only the first three characters of the unit setting will
then be displayed, even if the first character of the unit setting is a space.
When “ XXXXXX” or “ OOOOOO” are displayed as measurement value, no engineering unit
will be displayed.
001
Engineering unit
V 0.0467 H d
Measurement value
Alarm
Difference between channels
Channel No.
1st digit : unit No. (fixed to 0. A will be displayed in the case of optional computation channels.)
2nd digit : slot No. (depending on the number of modules : 0-1, 0-2, 0-3)
3rd digit : channel No. (in units of 1)
• Others
If you selected “SKIP” as the input type, that channel will not be displayed.
When the input type of all channels is set to “SKIP”, “***ALL SKIP***” will be displayed.
4.1 Using the Auto mode