Using The Ac2 Card - Renishaw SP600 Installation And User Manual

SP600 installation and user's guide
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Using the AC2 card

The AC2 is completely controllable by software. It also contains a 16 byte register set in I/O space that can be accessed starting from the
base address selected in 'AC2 I/O space base
Features
The AC2 has the same features as the AC1, but in addition has:
8-bit ISA bus interface in I/O space
X,Y and Z measurement channels with a resolution of 12 bits
Integral measurement event timer
Detection of a connected SP600 / M / Q
Probe power supply protection with failure monitoring
Interface for the SP600 overtravel unit
An optional 16-bit or 8-bit ISA bus interface in I/O space
An option to connect to a Delta Tau controller (customer supplied wiring adaptor required)
X, Y and Z measurement channels with a resolution of 16 bits
6 software selectable operating modes
Hardware synchronisation of data acquisition in 5 of the operating modes
ISA bus interrupt on data acquisition (in mode 3)
Probe power supply protection with resettable fuses
Paged version identification at the AC2 board identification register
ISA/ Delta Tau bus interface
The AC2 address space is in I/O space when the ISA bus is selected. Accesses in memory space are not permitted. The bus interface
can operate with 8­bit data (bytes) or 16­bit data (words). Selection of the ISA/ ΔT busses, base address and 8/16­bit modes are with
selection switches.
X, Y and Z measurement channels
These have 16­bit resolution. Each time the ACQUIRE bit (bit "11" of register "13") is written to with a "1", or the appropriate
synchronisation hardware is activated, the SP600 axis deflections are acquired and presented in registers "5" to "0", and the time latched
into registers "7" and "6".
Integral measurement event timer
This timer has a resolution of 256 microseconds and a maximum value of 16.78 seconds. The timer count register is updated every time
the SP600 deflections are acquired. The timer can be reset to zero when the RESET TIMER bit (bit "8" of register "13") is written to with a
"1". If the timer reaches its maximum count value of 65536, the TIMER OVERFLOW bit is set to "1". This can be inspected by reading the
AC2 status register (bit "5" if register "14"). The TIMER OVERFLOW bit is reset to "0" when the timer is reset.
Issued 01 2018
address'.
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