Siemens Solkor 7PG2113 Technical Manual page 164

Holding Registers (Read Write values)
Address
40001
Event Record
MODBUS does not define a method for extracting events; therefore a private method has been defined based on
that defined by [4] IEC60870-5-103.
Register 30001 contains the current number of events in the relays event buffer. Register 30002 contains the
earliest event record available. The event record is 8 registers (16 bytes) of information, whose format is
described below. When this record has been read it will be replaced by the next available record. Event records
must be read completely; therefore the quantity value must be set to 8 before reading. Failing to do this will result
in an exception code 2. If no event record is present the exception code 2 will be returned. The event address
should be polled regularly by the master for events.
Event Format
The format of the event record is defined by the zero byte. It signifies the type of record which is used to decode
the event information. The zero byte can be one of the following.
Type
1
2
4
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Description
Time Meter
Description
Event
Event with Relative Time
Measurand Event with Relative Time
7PG2113/4/5/6 Data Communications
Chapter 4 Page 19 of 38