Sensoray 826 - Manual (Page 29)

6.1.2 Reset State
Upon reset, all DAC outputs and all channels in both RAM banks are programmed to 0V with the output range set to 0 to
+5V.
6.2 Connector J1
DAC output signals are available on the analog I/O connector J1, which is shared with the ADC system. See Section 5.2 for
the connector pinout.
Each DAC channel has a single-ended output signal that is referenced to the board's power supply common. The output and
common signals are available on the analog I/O connector. DAC output signals are sensed at the connector; no external
sense inputs are available on the connector.
6.3 Programming
6.3.1 S826_DacRangeWrite
The S826_DacRangeWrite function programs the voltage range of an analog output channel.
int S826_DacRangeWrite(
uint board, // board identifier
uint chan, // channel number
uint range, // output range
uint safemode // RAM bank select
);
Parameters
board
826 board number. This must match the settings of the board's dip switches as described in section 2.2.
chan
DAC channel number in the range 0 to 7.
range
Enumerated value that specifies the output voltage range:
range Analog Output Range Notes
0 0 to +5V Default upon reset
1 0 to +10V
2 -5 to +5V
3 -10 to +10V
safemode
Specifies the RAM bank to be written: '0' = runmode, '1' = safemode.
Return Values
If the function succeeds, the return value is zero.
If the function fails, the return value is an error code.
Remarks
This function configures a channel's output voltage range and programs the setpoint to zero volts. It can be called at any
time, though it is typically called once per channel during program initialization for the runmode bank and, if
necessary, once per channel for the safemode bank as well (if default safemode values are not suitable).
The SWE bit must be set (see S826_SafeWrenWrite) to allow writing to the safemode bank. This function will fail
without notification (return S826_ERR_OK) if SWE=0 (see Section 10.1.1) when writing to the safemode bank.
826 Instruction Manual 24 Analog Outputs