Emerson E300 Series Design Manual page 404

Safety Product Mechanical
information information installation
L71 Trip Reset Source
Mode Open-Loop, RFC-A, RFC-S
Minimum 0
Default
Type 16 Bit Power Down Save
Display Format Standard
Coding RO, ND, NC, PT, BU
The bits in Trip Reset Source (L71) correspond to each of the trips in the trip log (i.e. bit 0 corresponds to trip 0, bit 1 corresponds to trip 1, etc.). When
a trip occurs, bit 0 is set to one and the other bits corresponding to the trips already in the trip log are shifted left one bit. If the trip is reset then bit 0 is
set back to zero, otherwise if a higher priority trip occurs bit 0 is shifted left by one bit. The result is that each of the bits in Trip Reset Source (L71)
show whether trips in the trip log were reset or moved up the trip log by a higher priority trip.
L72 Trip Time Identifier
Mode Open-Loop, RFC-A, RFC-S
Minimum -2147483648
Default
Type 32 Bit Volatile
Display Format Standard
Coding RO, ND, NC, PT
When a trip occurs the time in milliseconds since the drive powered up is stored in Trip Time Identifier (L72). The time rolls-over when it reaches 231
- 1, but if the time is 0 a value of 1 is written. Trip Time Identifier (L72) can be used to determine when a new trip has occurred as the value will change
(unless there were exactly 232 ms between trips) and will be non-zero.
L73 Potential Drive Damage Conditions
Mode Open-Loop, RFC-A, RFC-S
0
Minimum
(Display: 0000)
Default
Type 8 Bit Power Down Save
Display Format Binary
Coding RO, ND, NC, PT, BU
The bits in Potential Drive Damage Conditions (L73) are set under the conditions shown in the table below to indicate that the user has put the drive
in a condition that could potentially damage the drive. The bits in this parameter cannot be cleared by users.
Potential Drive Damage
Conditions (L73) bit
1 Low Under Voltage Threshold (O14) has been reduced from its default value.
2 High speed RFC-S mode has been used. See Enable High Speed Mode (B28).
3 Not used.
The bits in Status Word (L74) mirror the status bit parameters as shown below. Where the parameters do not exist in any mode the bit remains at
zero.
L74 Status Word
Mode Open-Loop, RFC-A, RFC-S
0
Minimum
(Display: 000000000000000)
Default
Type 16 Bit Volatile
Display Format Binary
Coding RO, ND, NC, PT
404
Electrical Getting
User Menu A Commissioning
installation started
Advanced
Diagnostics Optimization CT MODBUS RTU Technical Data
Parameters
Maximum 1023
Units
Update Rate Write on trip
Decimal Places 0
Maximum 2147483647
Units ms
Update Rate Write on trip
Decimal Places 0
15
Maximum
(Display: 1111)
Units
Update Rate background write
Decimal Places 0
Condition
32767
Maximum
(Display: 111111111111111)
Units
Update Rate Background Write
Decimal Places 0
E300 Design Guide
Issue Number: 1