Automatic control function programming manual ladder language

Analogue Inputs/Outputs
9.3 Write an Analogue Output anao
Syntax
anao(cch, woutput)
cch: Output address encoded on one byte.
woutput: Signed integer on 16 bits to be written.
Operation
Writes DAC channel ch of card c.
Detail of argument «cch»
Card location
Channel number
Bit 7 Bit 0
Refer to the Installation and Commissioning Manual for the card location on the system bus.
The values 0 to 7 correspond to the channel numbers of the eight input registers or eight output registers.
Example: Spindle speed programming controlled by the PLC
Read the miscellaneous function of the group (M3 or M4) specifying the spindle direction of rotation:
- M03_g = 1:clockwise
- M04_g = 1:counterclockwise
Read the spindle speed modulus (VITBRb). Its value ranges from 0 (zero speed) to 0x7FFF (maximum speed).
Send the DAC the signed encoded value on 16 bits. The sign depends on the spindle servo-drive wiring and the
miscellaneous function of the group:
- If the value is positive or zero, ANAO(cch, VITBRb),
- If the value is strictly negative, ANAO(cch, ~VITBRb).
Return code
If OK
0
Error
1: Card absent.
2: Card parameter error.
3: Channel parameter error.
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