BECKHOFF BC3100 - Manual (Page 41)

PROFIBUS bus terminal controller BC3100
BC3100 41
Index Write
0x00 Reserved for AMS
0x10 Functions (Length = 1 – 3 bytes):
Byte 0: 0 – Set write protection (Byte 1, 2 != 0xAFFE),
reset (Byte 1 = 0xFE, Byte 2 = 0xAF)
Byte 0: 1 – Set manufacturer configuration
Byte 0: 2 – Terminal bus reset
0x20 Start cycle time measurement (Word 0 != 0) / stop (Word 0
= 0) (Length = 2 bytes)
0x21 Initialise cycle times of the PLC (Length = 8 bytes):
Word 0: minimum cycle time (in 1/125 ms)
Word 1: maximum cycle time (in 1/125 ms)
Word 2: actual cycle time (in 1/125 ms)
Word 3: average cycle time (in 1/125 ms)
0xE0 Write PLC output bytes (Length = 3 – 48 bytes)
Byte 0/1: Byte-Offset
Byte 2-n: Data
0xE1 Write PLC input bytes (Length = 3 – 48 bytes)
Byte 0/1: Byte-Offset
Byte 2-n: Data
0xE2 Write PLC flag bytes (Length = 3 – 48 bytes)
Byte 0/1: Byte-Offset
Byte 2-n: Data
0xE3 Write PLC output bits (Length = 3 bytes)
Byte 0/1: Bit-Offset
Byte 2: Bit is set (1) / reset (0)
0xE4 Write PLC input bits (Length = 3 bytes)
Byte 0/1: Bit-Offset
Byte 2: Bit is set (1) / reset (0)
0xE5 Write PLC flag bits (Length = 3 bytes)
Byte 0/1: Bit-Offset
Byte 2: Bit is set (1) / reset (0)
Read PLC data alternative
(Slot_Number: 251-253)
In order that the PLC data can also be read individually, the Slot_Number
251 (PLC outputs), 252 (PLC inputs) and 253 (PLC flag) were defined. The
Index designates the Wordoffset in the respective area. Unfortunately, this
method of addressing is not supported by all masters.