Siemens sinumerik 840D sl Function Manual page 526

2.5.3 Parameter settings for input signals (840D)
The following input signals must be parameterized in the machine data:
• Clearance sensor input voltage
• "Sensor collision" input signal (optional)
Analog input
The following machine data must be parameterized for the analog input:
• MD10300 $MN_FASTIO_ANA_NUM_INPUTS (number of active analog NCK inputs)
• MD10362 $MN_HW_ASSIGN_ANA_FASTIN (per analog module) (hardware assignment
• MD10384 $MN_HW_CLOCKED_MODULE_MASK (per terminal block) (clock-
• MD10380 $MN_HW_UPDATE_RATE_FASTIO (per terminal block) (update rate for the
Digital input
The following machine data must be parameterized for the digital input:
• MD10350 $MN_FASTIO_DIG_NUM_INPUTS (number of active digital NCK input bytes)
• MD10366 $MN_HW_ASSIGN_DIG_FASTIN (per digital module) (hardware assignment
A complete description of the analog and digital inputs appears in:
References:
/FB2/ Function Manual, Extended Functions, Digital and Analog NCK I/Os (A4)
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
– 1 analog input
– 1 digital input
for the fast analog NCK inputs)
Specifying the physical address activates the analog input module
synchronous external NCK I/O processing)
The slot of the analog input module on the terminal block must be set to clock-
synchronous operation. To do this, set the machine data bit with the bit number of the
module slot from the analog input module in the terminal block. (Example: Slot 5 →
MD10384 = 10Hex )
clock-synchronous external NCK I/O)
Synchronization of the A/D converter to the position controller cycle
MD10380 = 2
for the external digital NCK inputs)
Specifying the physical address activates the digital input module.
Detailed description
2.5 Startup
21