Yokogawa JUXTA VJ Series Limit Alarms - Manual (Page 56)

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<7. Functions and Usage of I Relays >
IM 77J01J11-01E 3rd Edition : Oct. 15, 2007-00
7.1 Status
The following table shows how the I relays are classified.
I Relay Number Type of Status Description
1 to 16 Error information (same contents as those of D0001)
17 to 256 User area (that is used in some devices such as
graphic panels)
On-off
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CAUTION
• The I relays numbered 1 to 16 store on-off status information. Generally, this area can
be accessed to read the on-off status.
• When specifying an I relay number via communication, begin the number with an
upper-case letter I. For example, type "I0009" to specify the alarm-1 status (I relay
number: 9).
• No data may be written to or read from data storage areas with blank fields in the table
below. If you attempt to do so, the VJ Series signal conditioner may fail to operate
normally.
I Relay Number
I Relay Area
Description
3 Low-cut status
1 EEP error
2 EEP sum error
5 Communication error
4 AD off-scale (burnout)
7 History of power failures
6
9 Alarm 1 status
8 RJC error
11 Status of contact input
10 Alarm 2 status
13 Overflow of calculation cycle
12 Status of contact output
15
14 Calculation overflow
17 to 256 User area
16
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