Figure 4.3. d2d communication, Figure 4.4. node address transmittal – Rockwell Automation 1336T FORCE Series B User Manual
Page 109
Chapter 4
Startup
4–18
Message Transfer – The D2D allows each drive to transfer two words
and receive two words from two different drives for a total words received
of four (Figure 4.3).
Figure 4.3.
D2D Communication
Transmit
P11 Node Address
P14 Data 1 Indirect
P15 Data 2 Indirect
P20 Data 1
P21 Data 2
Receive 1
P12 Node Address
P16 Data 1 Indirect
P17 Data 2 Indirect
P22 Data 1
P23 Data 2
Receive 2
P13 Node Address
P18 Data 1 Indirect
P19 Data 2 Indirect
P24 Data 1
P25 Data 2
Node Address – The node address for the transmit is the address at which
the drive will transmit its two words of data. The node address for each of
the receives is the address of the drive which you wish to receive two
words of data from. If the node address is set to zero then the transmit or
receive is disabled. It is up to you to make sure there are no duplicate
transmit node addresses. If duplicate addresses exist, you must change one
address. Refer to the example in Figure 4.4.
Figure 4.4.
Node Address Transmittal
Drive #1
P11 Xmit Node Address 32
P12 Rcv 1 Node Address 5
P13 Rcv 2 Node Address 27
Drive #2
P11 Xmit Node Address 0
P12 Rcv 1 Node Address 5
P13 Rcv 2 Node Address 32
Drive #3
P11 Xmit Node Address 5
P12 Rcv 1 Node Address 0
P13 Rcv 2 Node Address 27
Drive #4
P11 Xmit Node Address 27
P12 Rcv 1 Node Address 0
P13 Rcv 2 Node Address 0
Note that a drive cannot receive its own address and both receives cannot
be set to the same address unless it is zero.
Data Indirect – The indirect function for the transmit indicates to the
D2D transmit (TX) where it should obtain data. The receive it indicates to
the D2D receive (RX) where it should put its data. Indirect parameters can
have either VP or CP parameters entered into them, or they can have
indirect data parameters entered into them as shown in the following
examples.
Transmitter Example:
P14 Drive Transmit indirect 1 – Any VP/CP Parameter
or – P20 (Drive Xmit Data 1)
P20 would then have a value or be linked to a non VP/CP parm.