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9 Operation at Use of a PC
9.3 Configuration of the Device
236
SICAM Q100, 7KG95xx, Device Manual
E50417-H1040-C522-A6, Edition 06.2019
The Modbus RTU Master bus protocol must be selected both for Modbus Master and for the Modbus Gateway
function.
Additional inter-character timeout
1 ms
0 ms to 100 ms
The Modbus specification requires that
the individual characters of a serial
Modbus RTU telegram have to be
transmitted successively with a
maximum character gap of 1.5
character times (or max. 750 µs for
Baud rates >19 200 bit/s). Longer silent
intervals between the characters are
interpreted as telegram end.
A longer gap between the characters
can be tolerated with this parameter.
Note that this also causes longer cycle
times then.
If at least one SICAM P50 device is
connected to the bus, at least the
following values have to be set for
Additional character string time
:
1200 bit/s, 2400 bit/s: 0
4800 bit/s, 9600 bit/s: 2
19 200 bit/s: 3
38 400 bit/s: 4
57 600 bit/s, 115 200 bit/s: 6
Maximum 0x/1x register gap
40
0 to 200
Maximum number of
not-mapped
reg-
isters which are being requested
between mapped registers in one
request telegram.
Maximum 3x/4x register gap
10
Table 9-31
Communication Serial Settings (cont.)
Parameter
Default Setting
Setting Range
MAN_SICAM_Q100_US.book Page 236 Wednesday, June 5, 2019 9:31 AM