Byte 8
(Shown in Table 30)
Bits 7, 6, 5, 4, and 3 of Byte 8 along with Bits 2, 1, and 0 of Byte 7 make up the first part of the PDU (Protocol Data Unit). The first 8 bits are the PDU format. The values for specific formats will have to be supplied by the user.
Bits 2, 1, and 0 of Byte 8 and bits 7, 6, 5, 4, and 3 of Byte 9 make up the second part of the PDU. The eight bits are the PDU specific. Values for the PDU specific will have to be supplied by the user .
NOTE: It is a common practice to combine the first and second parts of the PDU into a single number. When given the PDU as a single number, bit 2 of byte 7 is the MSB and bit 3 of byte 9 is the LSB.
1939STB4600 Manual | 23 |
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph
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