Description of the drive module
Positioning module IMD20, IMD40
For the CAN wiring, it is recommended to use twisted shielded cables with a characteristic
i
of 108
ms. In case of very small network extensions, it may be possible to
d
th the c
of the reference potential (CAN ground) (not recommended).
Data transfer
The data exchange with th
ule can b
g interfaces:
•
serial interface
•
Can bus
mpedance
ispense wi
to 132 oh
onnection
e drive mod
e realised via the two followin
RS232
The RS232 interface and Can bus connection can be found on frame connector X4 (IMD20) and
respectively frame connector X5 (IMD40).
Both interfaces can be used to access all objects (parameters) of the module. The access rights
depend on the communication channel which was set by means of the DIP switch on the front side.
Communica
channel
tion
Switch position
Access right
CAN
Node address
RS232:
Read
S6
0
Can:
Read and Write
unequal 0
RS232 S6
1
Can:
Read
d Write
Node address
unequal 0
RS232:
Read an
Analogue input
S6
X
RS232:
Read and Write ("Controlword"
Node address
and "Modes of Operation" ca
equal 0
w
n)
nnot be
ritte
In case of a communicatio via Can, the CanOpen protocol is u
(see last chapter).
n
sed
, parts
ts
II
r than 4 bytes.
Likewise, the boot-up message and the emergency messages in case of a fault is sent from the
module via the serial interface.
See “Monitor window for serial interface” on page 47
For the serial communication (asynchronous, 1 start bit, 8 data bits, 1 stop bit and no parity bit)
of this protocol are used, i.e. the SDO transfer, the emergency message and the boot-up message.
In case of the SDO, telegrams of a length of up to 8 bytes are exchanged between two participan
(see SDO description on page 81). These 8 bytes are transferred in hexadecimal format as ASC
characters, framed by an identifier and a checksum. Each message is terminated with a carriage
return (CR, 0x0D). Contrary to SDO, not the entire 8 bytes have to be transferred, if the data
contained are shorte
control
character
Check sum
1 - 8 byte data= 2 - 16 characters
1. Byte
Last byte
2 characters
1 character
Carriage
Return
1 character
34