62
11 Modbus register map
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MN012007EN March 2019 www.eaton.com
event type
number stored
Historical summary
200
Historical trip
10
Historical alarm
10
Event classification
A single triggering can place information into multiple event types. For example, the occur-
rence of an event triggered by a circuit breaker trip may provide both historical summary and
historical trip information.
Access to event information is based on the selection of event type and event ID. Register
408193 is a R/W register used to select the event type, using function code 06 or 16 to
write. The event information may be read by using function code 03 or 04.
When written event type selection in register 408193, the earliest and latest event ID can be
obtained respectively in register 408194 and 408196 to determine the range of events saved
for the selected event type. Register 408198 is a R/W register used to select the request
event ID and is written with function code 16. If request event exists in trip unit, register
408200 and 408202 provide the Previous event ID and Next event ID. If the requested
event doesn’t exist in trip unit, exception code 0 x 87 is returned.
The date and time when request event happened is read in registers 408204 through
408211 using the same date and time description as shown in 0. This value corresponds to
the time of occurrence of the historical event.
Register 408212 provides an indication of the selected event type’s data content. This is a
constant value for the three event types Modbus port supports.
Event data also provide a validity bit for each data object, starting from register 408213. Bit
0 setting to be 1 indicates that the first data is valid for current trip unit style, bit 1 for the
second data object, bit 2 for the third data object and so on. The number of validity bit regis-
ters is calculated as (number of data objects - 1)/16.
The following registers are the data objects. Request out of the range of the registers
address would result in exception code 02.
Historical summary
Register
format
R/w
Historical summary event
408193
Encoded
R/W
Event type: summary = 8EFF16
408194
Unsigned32
R
Earliest event ID
408196
Unsigned32
R
Latest event ID
408198
Unsigned32
R/W
Requested event ID
408200
Unsigned32
R
Previous event ID
408202
Unsigned32
R
Next event ID
408204
Date/time
R
Date/time
408212
Encoded
R
Format of data= 0000
16
, 0001
16
, 0004
16
, 0005
16
, 0006
16
408213
B0
R
Object validity bit
408214
Encoded
R
Event Cause:
00 = Power up – time OK
01 = Set points download
02 = Time adjusted
03 = Trip
04 = Alarm
05 = Enter test mode
06 = Exit test mode
08 = Power up – no time
09 = Test completed
10 = Maintenance mode active
11 = Maintenance mode inactive
12 = Opened by Communications
13 = Closed by communications
