Yokogawa Removable Chassis DX1000N - Manual (Page 26)

1-15
IM 04L41B01-01E
Overview of Functions
1
2
3
4
5
6
7
8
9
10
11
12
App
Index
Digital Display
Displays the measured data numerically using large numbers. For the operating
procedure, see section 4.2.
Unit
Tag or channel number
Alarm mark
Measured value
Note
• Numeric display of measurement channels
If a measured value of a measurement channel is over range (see below), the measured
value is indicated as “+Over” or “–Over.” If a burnout is detected on a channel whose
burnout detection function is enabled, the word “Burnout” is indicated. Otherwise, a numeric
value is displayed.
Over range of measurement channels
• For DC voltage input, over range occurs when the measured value of the measurement
channel exceeds ±5% of the measurable range. For example, the measurable range
when the measurement range is 2 V is –2.000 to 2.000 V. If the measured value exceeds
2.200 V, + over range occurs; if the measured value falls below –2.200 V, – over range
occurs.
• For thermocouple or RTD input, over range occurs when the measured value exceeds
approximately ±10°C of the measurable range. For example, the measurable range
when the measurement range is R is 0.0 to 1760.0°C. If the measured value exceeds
approximately 1770.0°C, + over range occurs; if the measured value falls below
approximately –10.0°C, – over range occurs.
• For channels that are linearly scaled, + over range occurs when the value exceeds
30000 excluding the decimal point; – over range occurs when the value falls below
–30000. However, + over range can be changed to greater than or equal to 105% of the
scale width and – over range to less than or equal to –5% of the scale width within ±
30000.
For the setting procedure, see section 3.11.
• Numeric display of computation channels
See section 1.8, “Computation and Report Function (/M1 and /PM1 Options)
• Alarm Indication
Alarm mark and measured value are displayed as follows according to the alarm
status. When you use the alarm annunciator function (release number 3 or later), the
alarm mark follows the annunciator sequence.
Alarm
Release
Alarm ACK Alarm ACK
Occurrence
When indication is
set to non-hold
When indication
is set to hold
Red Blue Red Blue Red Red Blue Blue Blue Blue Blue Measured
value
Blinking
red
Blinking
green
Blinking
red
Green Red Red Green Green Green Green Green Alarm mark
1.3 Display