DL06 Micro PLC User Manual, 3rd Edition, Rev. E
5-246
Chapter 5: Standard RLL Instructions
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Hi/Low Alarm - Binary (HILOALB) (IB-401)
Hi/Low Alarm - Binary monitors a binary (decimal) V-Memory location and sets four possible
alarm states, High-High, High, Low, and Low-Low whenever the IBox has power flow. You
enter the alarm thresholds as constant K decimal values (K0-K65535) and/or binary (decimal)
V-Memory locations.
HILOALB Parameters
• Monitoring Value (Binary): specifies the V-memory location of the Binary value to be monitored
• High-High Limit: V-memory location or constant specifies the high-high alarm limit
• High-High Alarm: On when the high-high limit is reached
• High Limit: V-memory location or constant specifies the high alarm limit
• High Alarm: On when the high limit is reached
• Low Limit: V-memory location or constant specifies the low alarm limit
• Low Alarm: On when the low limit is reached
• Low-Low Limit: V-memory location or constant specifies the low-low alarm limit
• Low-Low Alarm: On when the low-low limit is reached
Parameter
DL06 Range
Monitoring Value (Binary)
V
See DL06 V-memory map - Data Words
High-High Limit
V, K
K0-65535; or see DL06 V-memory map - Data Words
High-High Alarm
X, Y, C, GX,GY, B
See DL06 V-memory map
High Limit
V, K
K0-65535; or see DL06 V-memory map - Data Words
High Alarm
X, Y, C, GX,GY, B
See DL06 V-memory map
Low Limit
V, K
K0-65535; or see DL06 V-memory map - Data Words
Low Alarm
X, Y, C, GX,GY,B
See DL06 V-memory map
Low-Low Limit
V, K
K0-65535; or see DL06 V-memory map - Data Words
Low-Low Alarm
X, Y, C, GX,GY, B
See DL06 V-memory map
DS
Used
HPP
N/A
You must ensure that threshold limits are valid,
that is HH >= H > L >= LL. Note that when
the High-High or Low-Low alarm condition
is true, that the High and Low alarms will
also be set, respectively. This means you may
use the same threshold limit and same alarm
bit for the High-High and the High alarms
in case you only need one “High” alarm.
Also note that the boundary conditions are
inclusive. That is, if the Low boundary is K50,
and the Low-Low boundary is K10, and if the
Monitoring Value equals 10, then the Low
Alarm AND the Low-Low alarm will both be
ON. If there is no power flow to the IBox, then
all alarm bits will be turned off regardless of
the value of the Monitoring Value parameter.
