Operating The 1260-82 In Register-Based Mode - Racal Instruments 1260-82 User Manual

Operating The
1260-82 in
Register-Based
Mode
Module Operation 3-6
The 1260-82 may be operated by directly setting one of the two
control registers on the 1260-82 module. The first control register
on the module sets the position for each of the relays on the
module. The second control register controls the state of the
ERROR LED on the module.
The control registers are located in the VXIbus A24 Address
Space. The actual A24 address for a control register depends on:
1. The A24 Address Offset assigned to the 1260-01T module by
the Resource Manager program. The Resource Manager
program is provided by the VXIbus slot-0 controller vendor.
The A24 Address Offset is placed into the "Offset Register"
of the 1260-01T by the Resource Manager.
2. The <module address> of the 1260-82 module. This is set by
the setting of the logical Address DIP switch SW1 on the
1260-82 to a value between 1 and 12 inclusive .
3. The control register on the 1260-82 to update. Each control
register on the 1260-82 has a unique address.
The base A24 Address for the 1260-82 module may be calculated
by:
(A24 Offset of the 1260-01T) + (1024 x Module Address of
1260-82).
The A24 Offset is usually expressed in hexadecimal. A typical
value of 204000 will be used in the examples which follow. So,
16
a sample 1260-82 with a module address of 7 would have the
base A24 Address computed as follows:
Base A24 Address of 1260-82 = 204000
205C00
16
The control registers for 1260 series modules are always on odd
A24 addresses. The three control registers for the 1260-82 reside
at the following three odd A24 addresses for the module:
(Base A24 Address of 1260-82) + 5 = Relay Control Register
(Base A24 Address of 1260-82) + F = Error LED Control Reg
So, for our example, the control registers are located at:
205C05 Relay Control Register
1260-82 User Manual
+ (400 x 7 ) =
16 16 10