Lenze I/O system 1000 System Manual - Manual (Page 610)

DeviceNet communication
Parameterising technology modules
RS485 interface − EPM−S650
11
l
610 EDSIO1000 EN 7.0
Parameter data STX/ETX protocol
Lenze Description/value Name Pos. in
string of
digits
10 No. of start identifiers 00
h
: 1 start identifier (2. start identifier is ignored)
01
h
: 2 start identifiers
01
h
11 Start identifier 1 ASCII value of the initial character that is sent in
advance of a frame and marks the start of a
transmission.
1 ... 255 (01
h
... FF
h
)
02
h
12 Start identifier 2 ASCII value of the initial character that is sent in
advance of a frame and marks the start of a
transmission. 00
h
13 No. of end identifier 00
h
: 1 end identifier (2. end identifier (0x310D/x) is
ignored)
01
h
: 2 end identifiers
01
h
14 End identifier 1 ASCII value of the end character that is sent after a
frame and marks the end of a transmission.
1 ... 255 (01
h
... FF
h
)
03
h
15 End identifier 2 ASCII value of the end character that is sent after a
frame and marks the end of a transmission.
1 ... 255 (01
h
... FF
h
)
00
h
16 Operating mode Operating mode of the interface
00
h
: Half duplex − two−wire operation (RS485); the data
are transferred alternately in both directions between
the communication partners.
01
h
: Full duplex − four−wire operation (RS422); the data
are exchanged simultaneously between the
communication partners; transmission and reception
can take place at the same time. Each communication
partner must simultaneously actuate a receive path.
Note: For the "Half duplex" parameterisation under
RS485, no software data flow control is possible.
00
h
17 Cable assignment For a connection with minimum reflections and the
open circuit detection in RS422/485 operation, the
cables can be pre−assigned via parameters with a
defined idle level (
^ 228).
00
h
: No pre−assignment of the receive path. This
setting is only advisable for special drivers that are
provided with a bus capability.
01
h
: Signal R(A) 5 V (open circuit monitoring); signal
R(B) 0 V. In full duplex operation under RS422, open
circuit monitoring is possible.
02
h
: Signal R(A) 0 V; signal R(B) 5 V. This
pre−assignment corresponds to the idle state (no
transmitter active) in half duplex operation under
RS485. Open circuit monitoring is not possible.
13
h