26
CMD-2:
Designates the exact command within the section specified by
CMD-1
.
DATA 0..15
:
If the command requires extended data, the
DATA COUNT
will be set to between 1 and 15 (a 0 indicates
that no extra data is required). These bytes will be placed here.
CHECKSUM
:
This byte is used to check the data for communication errors. To calculate the checksum, each byte of the
command (
CMD-1
+
DATA COUNT
,
CMD-2
, and any
DATA BYTES
) are added together. The least
significant 8 bits (1 byte) are then truncated to create a 1-byte checksum.
I.e.: The command “61.0C.03” becomes
MSB
LSB
0110
0001
(=61)
0000
1100
(=0C)
+)
0000
0011
(=03)
0111
0001
(=70)
CHECKSUM
=
“70”
Therefore, the complete command is “61.0C.03.70”
3.
Connector Pin Assignment
Interface: 9 pin D-Sub female
The
RS-422
pin assignment of the Controller and HDR-40/50 is shown in the following table:
Signal
Pin
Controller HDR-40/50
1 Frame
Ground
Frame
Ground
2
Receive A (RX-)
Transmit A (TX-)
3
Transmit B (TX+)
Receive B (RX+)
4 Transmit
Common
Receive
Common
5 Spare
Spare
6
Receive Common
Transmit Common
7
Receive B (RX+)
Transmit B (TX+)
8
Transmit A (TX-)
Receive A (RX-)
9 Frame
Ground
Frame
Ground
The
RS-232
pin assignment of the Controller and HDR-40/50 is shown in the following table:
Signal
Pin
Controller HDR-40/50
1 -
-
2
Receive (RX)
Transmit (TX)
3 Transmit
(TX)
Receive
(RX)
4 -
-
5 GND
GND
6 -
-
7 -
-
8 -
-
9 -
-
USO
RESTRITO
