Examples - YASKAWA CP 040 RS422/485 Manual

VIPA System SLIO
Offset
User data
Acknowledgement

4.3.3 Examples

Send data without frag-
mentation
Send data with fragmenta-
tion
HB300 | CP | 040-1CA00 | en | 18-28
If the Telegram-Info-Byte is 04h, an additional offset is entered. Otherwise there is no
Offset in the telegram. Calculating the Offset with fragmented transfer:
Data_Offset = (Fragment_counter + 1) × (IO_Size-1) -7 + Offset
n Data_Offset:
– Offset of the data in the input area
n Fragment_counter:
– Absolute number of fragments
n IO_Size:
– Number of used bytes in the address area
n Offset:
– Offset value in the telegram
Here the received user data of the serial communication may be found.
Bit 3...0 Reserved for sending
Bit 7...4 n 8h: Acknowledgement: Idle state
n Ah: Acknowledgement: input area free for new data
n Bh: Command: Execute a reset on the CP
IO-Size = 60byte, length = 40byte
Host system
Byte Function
0 0Ah Command
1 00h Telegram-Info
2 00h Length high byte
3 28h Length low byte
4...43 User data byte 0...39
44...59 is not used
IO-Size = 16byte, length = 50byte
Header Host system
Byte Function
0 09h Command
1 00h Telegram-Info
2 00h Length high byte
3 28h Length low byte
Principal communication via back plane bus > Examples
Byte Function
u
t
0 A0h Acknowledgement
Byte Function
u
Deployment
CP
CP
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