2.3 Input ports of the V-Mon 4000
The inputs and of the VMonDrv driver can be accessed as shown in Fig. 2.2.
One block of the From type allowing the user to read one input has the Goto tag set to VMON__N1S1, while the other has this tag set to VMON__N1S2. The number in the flag following the N letter corresponds with the node identification number (ID) - where to find node ID is described in the chapter 3 and the S letter is followed by the signal number. For some of the signals, there is a possibility to use an alias. Complete list of the signals and aliases may be found in the table 2.1. The blocks always have the VMON prefix right at the beginning of the tag followed by two _ characters (underscore).
Signal number | Function | Alias |
S1 | Analogue input 1 | – |
S2 | Analogue input 2 | – |
S3 | Analogue input 3 | – |
S4 | Analogue input 4 | – |
S6 | Accelerometer x | ax |
S7 | Accelerometer y | ay |
S8 | Accelerometer z | az |
S10 | Compass x | cx |
S11 | Compass y | cy |
S12 | Compass z | cz |
S14 | Gyroscope x | gx |
S15 | Gyroscope y | gy |
S16 | Gyroscope z | gz |
S18 | Battery | bat |
S19 | Temperature | temp |
S20 | External power supply | extI |
S22 | Time delay between last two samples | tDelay |
S23 | Time stamp of the last sample | tsLast |
S24 | Last sequence number | seqNo |
The connection string in the From flag thus consist of the driver name , two underscores __, (N) letter and node identification number, (S) letter and signal number (or alias).
For the signals may be separated into groups (analogue inputs, accelerometer, status) there is a possibility to use multi-input blocks (INQUAD). The advantages of such blocks are increased processing speed and better readability of the algorithm. The signal numbers and corresponding aliases are listed in the table 2.2. Detailed description of the multiple-input blocks may be found in the function block reference manual[3].
Signal number | Function | Alias |
S5 | All analogue inputs | S |
S9 | Accelerometer signals | A |
S13 | Compass signals | C |
S17 | Gyroscope signals | G |
S21 | Status information | stat |
All supported input blocks are listed in the example in the installation folder
\EXAMPLES\IODRV\VMON_Example
Status information (signals S18 - S21) are available only when using a version for Windows in combination with the Boost library (configuration number 4 in the chapter 3).
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