Feature register (R32) IP/IE4112
The module's fundamental settings can be modified in the feature register. Write protection must first be cancelled in the code-word register before it is possible to write into this register.
Bit | Value | Description | Manufacturer’s setting |
|---|---|---|---|
0 | 0 | User scaling is inactive | 0 |
1 | User scaling is active | ||
1 | 0 | Manufacturer scaling is inactive | 1 |
1 | Manufacturer scaling is active | ||
2 | 0 | Watchdog timer active. | 0 |
1 | Watchdog timer inactive. | ||
3 | 0 | reserved | 0 |
4 | 0 | reserved | 0 |
5)1 | 0 | 0..20 mA mode | 0 |
1 | 4..20 mA mode | ||
8 | 0 | Manufacturer switch-on value [0] | 0 |
1 | User switch-on value R35 | ||
9 | 0 | reserved | 0 |
... | ... | ... | ... |
15 | 0 | reserved | 0 |
Explanation of the watchdog timer
The watchdog timer is switched on by default. If the watchdog overflows, then either the manufacturer's or the user's switch-on value is output by the module.
For reasons of compatibility, 16 bit signed integer is selected as the standard output format. The range of positive values for 0..20 mA ranges from 0x0000 to 0x7FFF. This corresponds to 15 bits. Manufacturer scaling must be deactivated in order to exploit all 16 bits.)1 As from I/O circuit board software version IP4112-Bxxx "2" IE4112 "0"