S7-PCI315:Read State
From IBHsoftec Wiki English
Read current state with SFC1011
The state of the internal battery of S7-PCI315, the existence of a SD card and the current power source can be read with a special SFC. A Library for STEP®7 can be found in the installation folder.
Read State SFC
CALL SFC 1011
| ENABLE_ADC | := TRUE | //INPUT BOOL |
| RET_VAL | := MW 0 | //RESULT INT |
| STATUS | := MW 2 | //OUTPUT WORD |
| VOLTAGE | := MW 4 | //OUTPUT WORD |
| SERIAL_NUMBER | := MD 6 | //OUTPUT DWORD |
| DEVICE_NUMBER | := MD 10 | //OUTPUT DWORD |
| Parameter | Type of data | Description |
|---|---|---|
| ENABLE_ADC | BOOL | Start of battery voltage measurement with a positive edge. The measurement should not be done too frequently, because every measurement requires a litte amount of energy from the battery. |
| RET_VAL | INT | Always 0 |
| STATUS | WORD | Bit 0 = 1 if Micro-SD card is inserted Bit 1 = 1 if the PLC has been started without program Bit 2 = 1 if the PLC program has been loaded from the battery buffered SRAM Bit 3 = 1 if the PLC programm has been loaded from internal flash Bit 4 = 1 if the PLC programm has been loaded from the Micro-SD card Bit 5 = 1 if power supply from the PC is detected Bit 6 = 1 if an external 24V power supply is detected Bit 7 = 1 if the PCI bus is active Bit 8 = 1 if battery voltage measurement is completed |
| VOLTAGE | WORD | Analog value of battery voltage, valid for one cycle when the measurement has been completed |
| SERIAL_NUMBER | DWORD | Serial number of the card |
| DEVICE_NUMBER | DWORD | Order number of the card |
Status word
If successful the BR of the status word is set, OR, STA and /FC are zero.
If failed the BR, OR, STA and /FC of the status word are zero.
