BECKHOFF BC3100 User 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.