Block

Mask

Description

This block implements the IEC60044-8 protocol between a valve balancing controller (VBC) and a pole controller based on HDLC serial protocol . This is the communication unit used in the VB or Pole controller.

bit	15:0
H	0x0564
R0	Block 1 Data R0
R1	Block 1 Data R1
R2	Block 1 Data R2
R3	Block 1 Data R3
R4	Block 1 Data R4
R5	Block 1 Data R5
R6	Block 1 Data R6
R7	Block 1 Data R7
CRC
R0	Block 2 Data R0
R1	Block 2 Data R1
R2	Block 2 Data R2
R3	Block 2 Data R3
R4	Block 2 Data R4
R5	Block 2 Data R5
R6	Block 2 Data R6
R7	Block 2 Data R7
CRC
...	...
R0	Block N Data R0
R1	Block N Data R1
R2	Block N Data R2
R3	Block N Data R3
R4	Block N Data R4
R5	Block N Data R5
R6	Block N Data R6
R7	Block N Data R7
CRC

Parameters

Sample Period	This is a non-modifiable parameter. It is used to specify the FPGA clock period.

Inputs

HDLC Serial DataIn

This is the serialized data link received from the PCP/VBC unit, moduled with Manchester encoding and sent using the IEC60044-8 standard as defined by the HDLC-1/HDLC-2 byte assignation.

Start transfer

This port is used to start a transmission. When activated the following 9 input signals are registered and then sent on the serial link using the IEC60044-8 standard as defined by the HDLC-2 byte assignation.

Number Of Block

This port is used to specify the number of block in the current HDLC frame (see Characteristics and Limitations for more details).

DataIn Block[X] where X = [1 to 15]

This is a 128 bits wide Data Block in the transmit HDLC frame (see Characteristics and Limitations for more details). When writing to this port, users must place data in this format:

Bit Position	Data Descriptions
15:0	Block X Data R0
31:16	Block X Data R1
47:32	Block X Data R2
63:48	Block X Data R3
79:64	Block X Data R4
95:80	Block X Data R5
111:96	Block X Data R6
127:112	Block X Data R7

Outputs

HDLC Serial DataOut

This is the serialized data link transmitted to the PCP/VBC unit, moduled with Manchester encoding and sent using the IEC60044-8 standard as defined by the HDLC-1/HDLC-2 byte assignation.

DataOut Valid

A full packet of new data has just been received. This is simply a 1-cycle pulse activated once all data is registered on the outputs.

DataOut Block[X] where X = [1 to 15]

This is a 128 bits wide Data Block in the received HDLC frame (see Characteristics and Limitations for more details). The table below shows how received data are formatted for each data block.

Bit Position	Data Descriptions
15:0	Block X Data R0
31:16	Block X Data R1
47:32	Block X Data R2
63:48	Block X Data R3
79:64	Block X Data R4
95:80	Block X Data R5
111:96	Block X Data R6
127:112	Block X Data R7

Characteristics and Limitations

The current IEC60044-8 is a length-flexible frame. The range of data BLOCK carried in each frame is from 1 to 15. Every Block includes 16 Bytes. CRC checksum is computed for each Block. The initial value of the 16-Bit verification sequence generated by this criterion is 0x0000 and the calculating result is bitwise negated.

The "Start Transfer" input signal is typically fed by a pulse train generated with an interval of 100 microseconds between pulses.

Direct Feedthrough	N/A
Discrete sample time	N/A
XHP support	N/A
Work offline	NO