Commissioning; Data Formats - KBR multisys 1D3-ESDP Operating Instructions, Technical Parameters

MULTIGATE-Profibus / multisys 1D3-ESDP
5

Commissioning

After the configuration and all the wiring have been successfully completed, the MULTIGATE-Profibus /
multisys 1D3-ESDP can be put into operation. Here it should be ensured that the gateway is the final device to
be switched on, or that the KBR eBus device and gateway are supplied with power at the the same time. The
gateway can now be found on the Profibus under the address set, and it can be parametrized and configured via
a suitable configuration tool.
6

Data formats

(unsigned) short :0x1234
Address +0
Contents 0x12
Table 2: unsigned short
Rule for byte sequence:
MSB before LSB
(unsigned) long:0x12345678
Address +0
Contents 0x12
Table 3: unsigned long
Rule for byte sequence:
MSB before LSB
float:
Format
Representation
Accuracy
Composition
Mantissa
Exponent
Page - 6 -
+1
0x34
+1 +2 +3
0x34 0x56 0x78
corresponds to the IEEE 754 standard
4 bytes
24 bits ( represent >7 decimal points)
24-bit mantissa; 8-bit exponent
23 bits (M) + 1 bit (S)
The MSB of the mantissa always amounts to 1 => it is not saved separately!
S = sign for the mantissa: S = 1
number
8 bits (0-255); is saved relative to 127, ie. the current value of the exponent
is deduced by subtracting the number 127 from the value saved.
Curr. exp. = saved value of exp. – 127 => Number range from 128 to -127!
Numeric range which can be represented:
1.18E-38 to 3.40E+38
Table 4: float
negative number; S = 0 positive
Version 1.0