IG-267-EN versión 01; 07/04/2017
108
Communications General Instructions
ekor.rpa
The variable-length frames (with application data) have the
following length:
Oset Name Value Description
0
Start1 0 x 68 Variable-length frame start indication
0.1
Length 0 x 02
0 x FB
User data length (in Little Endian), from Offset 3 to Offset immediately
before the addition
The contents of the first byte are copied on the second byte, therefore if
length = 10 bytes, the value of the field is 0x0A0A
2
Start2 0 x 68 User data start indication
3
Control 0 x 00 – 0 x FF Control word
4
Address 0 x 00 – 0 x FF Destination/source node address
5
-
Length + 3
Data User data. The ASDUs are included here
Length + 4
Sum 0 x 00 – 0 x FF Sum of the control, address and data fields
Length + 5
End 0 x 16 End of frame indication
Table 12.15. Variable length frames
The following frames are used in PROCOME in the Master to
Slave direction:
# Name Fcv Description
0
SEND RESET UC No Reset order of the slave link level
The slave must delete its queue of changes from ED and set the value of the last FCB received to 0
Positive (0, CONFIRM ACK) or negative (1, CONFIRM NACK) confirmation from the slave is awaited.
3
SEND DATA Yes Data sending with confirmation
The performance orders are sent to the ekor.rp.ci units by this system
Positive 0, CONFIRM ACK or negative 1, CONFIRM NACK confirmation from the slave is awaited.
4
SEND DATA NR No Data sending without confirmation
The date/time of the system is sent to the ekor.rp.ci using this system.No response is awaited from the slaves
6*
REQUEST DATA S Yes Specific data request.
It is used to obtain control data from the slaves. The value of ED, EA and EC, as well as the changes to ED, are
obtained from the ekor.rp.ci units with this mechanism
A response with data is awaited (8, RESPOND DATA), with the data not yet available (9, RESPOND NO DATA)
or not yet implemented (15*, RESPOND NO IMP)
7*
SEND RESET FCB No Reset order of the slave FCB bit level
The slave must set the value of the last FCB received to 0, without deleting its queue of changes. Positive
confirmation from the slave is awaited.
(0, CONFIRM ACK) or negative (1, CONFIRM NACK)
9
REQUEST LSTS No Link level status request
It is used to check if the slave is connected. A response 11 is awaited, RESPONDF LSTS
10
REQUEST DATA C1 Yes Category 1 (urgent) data request
It is used to obtain urgent data from the slaves. This mechanism only allows the cause of the equipment
restart to be obtained from the ekor.rp.ci units
A response with data is awaited (8, RESPOND DATA), with the data not yet available (9, RESPOND NO DATA)
or not yet implemented (15*, RESPOND NO IMP)
11
REQUEST DATA C2 Yes Category 2 (non-urgent) data request
It is used to obtain non-urgent data from the slaves
A response with data is awaited (8, RESPOND DATA), with the data not yet available (9, RESPOND NO DATA)
or not yet implemented (15*, RESPOND NO IMP)
Table 12.16. Frames in master to slave direction
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