Configuring converters / MasterCAN RS2CAN configuration for data conversion from Modbus RTU registers into SPN
MasterCAN RS2CAN / CAN2RS data converters. Operation manual. Version 1.0
©
Technoton, 2020
37
Examples:
a) In case the value of the
from the register is read in bars and the output SPN is
specified in kPa, then, taking into account the correlation 1 bar=100 kPa, the
factor
rg
base
value should be multiplied by 100.
b) To
recalculate the temperature Parameter from K into °
C, you need to deduct 272.15 from
offset
rg
.
2)
In the right portion of each slot (after the character
the converted data will be transferred into CAN iterface (see figure 21):
•
By pressing
button, select the required SPN from
into which the
data conversion from Modbus RTU register is to be performed (see figure 22).
For your convenience, search the SPN by the SPN number or name entered into the
search bar of
Select SPN/PGN
will be transmitted and confirm its selection by pressing
button.
After that, both the number, and the name of the selected SPN, as well as the PGN
number (
) will be displayed in the slot.
Figure 22
—
Window of SPN selection from the list of BD S6
WARNINGS:
1)
In case the data type of the selected SPN does not match the code of “Reading coil
registers (01)” function or “Reading discrete inputs (02)” function, we recommend to
select SPN only with whole numbers values (factor coefficient
—
1).
2)
When the selected SPN is changed, the number of registers is automatically reset
to 1 and the correction of the value in
Register Number
) field may be
needed by replacing it with the source device value, according to Modbus RTU list of
registers.
3)
For values of SPN that are less than 8 bits long, you need to specify the function
codes
“Reading coil registers (01)” or “Reading discrete inputs (02)”; otherwise the
notification of incompatibility will be displayed.
4)
The value of
Offset
setting for Modbus RTU registers must be within the admissible
SPN change range. Then, during the conversion of the register value into the output
SPN there will be no overfill and no incorrect SPN value will be received.
