User Manual
70
40005E (Enhanced Bargraph Indicator)
REF NO: m42B/om/101
Issue No: 02
7.
Data for record number 5 - 6 will be loaded into data registers
8.
Write Fetch data = 1
9.
Data for record number 7 - 8 will be loaded into data registers
10.
So in same manner data registers will be filled with 2
– 2 records.
11.
After all data fetch Write Hold Data = 0.
2. For Event Logging:
Event Data logging Record Frame Detail:
Parameter Detail
Bytes
Log Frame detection (101,102)
2
Record Number
4
Time Stamp
6
Channel Number
1
Process Value
2
Alarm-1/2[Bit 0 and Bit 1],Alarm Status[Bit 2], LED Status[Bit 3], DO
Status[Bit 4]
1
Total Bytes in 1 record =
16
Data Fetching method is same as periodic logging.
Modbus Address for Event Data fetching:
Sr.
No
Parameter Description
Modbus
Address
Parameter
Type
Access
Remarks
1
Data Fetched Event Log
42401-
42356
Integer
R
-
2
Hold Event Data
42460
Integer
R/W
-
3
Fetch Event Data
42459
Integer
R/W
-
4
Total Periodic Records
42457-
42458
Integer
R
42457[Higher byte]
42458[Lower Byte]
5
Log Roll Over counter for Overlap
Mode
42461
Integer
R
-
Description:
o
Here we have used Flash Memory so that data will be fetched in the form of multiple records.
Flash page size is of 256 bytes.
o
The record length is fixed as 16 bytes.
o
Record per page = 14
o
Not required to set fetch mode
o
Example for Fetching data :
Example 1 :
1.
Write Hold Event Data = 1
2.
Write Fetch Event Data = 1
3.
Data for first 7 records are loaded into data registers
4.
Write Fetch Data = 1
5.
Data for record number 7 to 14 will be loaded into data registers
6.
Write Fetch data = 1
7.
Data for record number 15 to 21 will be loaded into data registers
8.
Write Fetch data = 1
9.
Data for record number 22 to 28 will be loaded into data registers
10.
So in same menner data registers will be filled with 7- 7records.
11.
After all data fetch Write Hold Event Data = 0.
