Siemens SICAM Q100 7KG95 Series Manual page 236

9 Operation at Use of a PC
9.3 Configuration of the Device
Table 9-31
Parameter
Additional inter-character timeout
Maximum 0x/1x register gap
Maximum 3x/4x register gap
The Modbus RTU Master bus protocol must be selected both for Modbus Master and for the Modbus Gateway
function.
236
Communication Serial Settings (cont.)
1 ms
40
10
Default Setting
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
0 to 200
Maximum number of not-mapped reg-
isters which are being requested
between mapped registers in one
request telegram.
Setting Range
SICAM Q100, 7KG95xx, Device Manual
E50417-H1040-C522-A6, Edition 06.2019