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Parameter
Parity
Additional inter-character
timeout
Maximum 0x/1x register gap
Maximum 3x/4x register gap
15.2.5.2
Modbus Slave Devices
Table 15-12
Parameter
Name
Activated
Device address / Unit ID
(Modbus slave device address)
Scan cycle for measured values 50 (*10 ms)
SICAM, SICAM Q100 7KG95xx, Manual
E50417-H1040-C522-A9, Edition 06.2021
Default Settings
Even
1 ms
40
10
Settings for the Modbus Slave Devices
Default Setting
Modbus slave device x
No
1
Operational Indications and Operating Parameters
Setting Range
None, 1 stop bit
Even
Odd
None, 2 stop bit
0 ms to 100 ms
The Modbus specification requires that the indi-
vidual characters of a serial Modbus RTU tele-
gram 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.
If at least one SICAM P50 device is connected to
the bus, at least the following values have to be
set for Additional inter-character timeout:
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 registers
which are being requested between mapped
registers in one request telegram.
Setting Range
Max. 31 characters
No
Yes (= Activation of the option field):
The buttons for parameterization of the
mapping data are also activated for the slave
device here.
1 to 247
Address corresponds to the Unit ID in the
Modbus TCP telegram with simultaneous use of
the Modbus Gateway function
0 to 36 0000 * 10 ms
(10 ms to 1 h)
0 = Each interrogation cycle
Minimum time difference between the meas-
ured-value requests
15.2 Basic Functions
351
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