Publication 1794-6.5.11 - November 1997
4-4
Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter
Word 4
Bits 00
Missing Pulse Alarm (channel 1) – Indicates when no Frequency input pulse has occurred within the period
determined by the Minimum Frequency Sampling Time and the Missing Pulse Multiplier. Primary control is given to
the Missing Pulse Multiplier to determine when this bit is set. However, if the Missing Pulse Multiplier is set to 0,
then the Minimum Frequency Sampling Time characteristics will determine when this bit is set.
Bit 01
Wire Off Fault Alarm (channel 1) – when set, indicates when 24 Vdc Input (IEC 1+ or Switch Contact with shunt)
Wire Off Detection has gone true for any of the Frequency or Gate inputs on a channel that has the Wire Off Fault
Select = 1.
Bit 02
Frequency or Acceleration Alarm (channel 1) – Changes state from 0 to 1 if the calculated Frequency (actual or
scaled) exceeds the user programmed Maximum Frequency, or the absolute value of calculated
Acceleration/Deceleration exceeds the user programmed Maximum Acceleration Value.
The Frequency Alarm turns off when the Frequency drops below
95%
of the Alarm Value.
The Acceleration Alarm turns off when the Acceleration drops below
90%
of the Alarm Value.
Bit 03
Gate Input State (channel 1) – Indicates if there is a valid signal on the gate input. This parameter is only
determined once every 0.5 – 2s.
Bits 04-05
Direction (channel 1) – Indicates the current Direction of Rotation, using both the Frequency and Gate inputs.
(Frequency leads Gate = Clockwise, Gate leads Frequency = CounterClockwise). Used for slow speed detection
from 1 – 1,500Hz. “No” or “Stopped” rotation can be determined by the state of the Missing Pulse Alarm, when it
is switched on. A missing Frequency Input will generate a Missing Pulse Alarm, a missing Gate Input will only
generate a “No Sensor Present / Detected” status (3).
Bits 06-07
Not used
Bits 08 (10)
Missing Pulse Alarm (channel 0) – Indicates when no Frequency input pulse has occurred within the period
determined by the Minimum Frequency Sampling Time and the Missing Pulse Multiplier. Primary control is given to
the Missing Pulse Multiplier to determine when this bit is set. However, if the Missing Pulse Multiplier is set to 0,
then the Minimum Frequency Sampling Time characteristics will determine when this bit is set.
Bit 09 (11)
Wire Off Fault Alarm (channel 0) – When set, indicates when 24 Vdc Input (IEC 1+ or Switch Contact with shunt)
Wire Off Detection has gone true for any of the Frequency or Gate inputs on a channel that has the Wire Off Fault
Select = 1.
Bit 10 (12)
Frequency or Acceleration Alarm (channel 0) – Changes state from 0 to 1 if the calculated Frequency (actual or
scaled) exceeds the user programmed Maximum Frequency, or the absolute value of calculated
Acceleration/Deceleration exceeds the user programmed Maximum Acceleration Value.
The Frequency Alarm turns off when the Frequency drops below
95%
of the Alarm Value.
The Acceleration Alarm turns off when the Acceleration drops below
90%
of the Alarm Value.
Bit 11 (13)
Gate Input State (channel 0) – Indicates if there is a valid signal on the gate input. This parameter is only
determined once every 0.5 – 2s.
Bits 12-13
(14-15)
Direction (channel 0) – Indicates the current Direction of Rotation, using both the Frequency and Gate inputs.
(Frequency leads Gate = Clockwise, Gate leads Frequency = CounterClockwise). Used for slow speed detection
from 1 – 1,500Hz. “No” or “Stopped” rotation can be determined by the state of the Missing Pulse Alarm, when it
is switched on. A missing Frequency Input will generate a Missing Pulse Alarm, a missing Gate Input will only
generate a “No Sensor Present / Detected” status (3).
Bits 14-15
(16-17)
Not used
Word
Bit
Definition