Control_O Byte; Control_O_1 Byte - Siemens SIPROTEC Manual

Redundant PROFIBUS DP interface
Slave Primary /
Slave Backup
Toggle bit
confirmation
1.4.1.3

Control_O byte

Reference
Bit assignment
Message block
number
1.4.1.4

Control_O_1 byte

Reference
Bit assignment
24
Bits 2 and 3 of the "Control_I_1" byte signal the redundancy state of the slave module
to the PROFIBUS DP master. The following bit combinations are valid:
• Bit 3 = 0 and bit 2 = 1: Module is BACKUP or in redundancy start-up
• Bit 3 = 1 and bit 2 = 0: Module is PRIMARY
The Toggle bits which were sent to the slave in the "Control_O_1" byte by the PROFI-
BUS DP master (ref. to chap. 1.4.1.4) are mirrored back in these bits.
Handshake byte for the event list
Standard mapping 3-1 and 3-3, ref. to chap. 3.1.1
Standard mapping 3-4, ref. to chap. 5.1.1
7 6 5
Message block no.
Figure 1-6 Handshake byte "Control_O" (output direction)
Acknowledgement of reception and evaluation of the message blocks.
After evaluation of the message blocks, the PROFIBUS DP master copies the mes-
sage block number from the handshake byte "Control_I" of the input telegram to the
handshake byte "Control_O" of the output telegram.
Control byte for the redundancy function
Standard mapping 3-3, ref. to chap. 3.1.1
Standard mapping 3-4, ref. to chap. 5.1.1
7 6 5
reserved = 0
Figure 1-7 Control byte "Control_O_1" (Output direction)
Control_O
4 3 2 1
reserved = 0
Control_O_1
4 3 2 1
SIPROTEC PROFIBUS DP - Bus mapping 6MD662/3/4
0 Bit position
Meaning
0
Bit position
Meaning
C53000-L1840-B011-03