Specifications

Appendix Process Images
A - 8
MITSUBISHI ELECTRIC
A.1.5 Analog Output Modules
STL-DA2-V (ID number 51205042) and STL-DA4-V1 (ID number 51205038)
The analog output modules STL-DA2-V (two channels, 0 to 10 V) and STL-DA4-V1 (four channels, 0 to
10 V) require 16-bit data and 8 status bits per channel.
The digitalized output value is transmitted in a data word (16 bits) as output byte 0 (low) and output
byte 1 (high) via the process image of the head station. This value is represented with a 12 bit reso-
lution on the bits b3 to b14. The three least significant bits (b0 to b2) are not parsed.
Some fieldbus systems can process status information by means of a status byte. As the returned sta-
tus byte of this output module is always zero, it will not be parsed.
X: Not relevant
Fig. A-11: Process image of the analog output modules STL-DA2-V and STL-DA4-V1
Output
[V]
Numerical value
Status
byte
(Hex.)
Binary
Hexa-
decimal
Decimal15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
X Output value X X X
0.00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0000 H 0 00 H
1.25 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1000 H 4096 00 H
2.50 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 H 8192 00 H
3.75 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 3000 H 12288 00 H
5.00 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4000 H 16384 00 H
6.25 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 5000 H 20480 00 H
7.50 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 6000 H 24576 00 H
8.75 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 7000 H 28672 00 H
10.00 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 7FF8 H 32760 00 H
Tab. A-7: Process values and corresponding output values for the STL-DA2-V and STL-DA4-V1
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Output byte 1
XXX0/10/10/10/10/10/10/10/10/10/10/10/1X
Output byte 0
X: Not used