Hardware reference guide

Intelligent/Special Purpose

334

35013379 11/2011

Zeros in the 4X registers also mean no change. Setpoint, maximum count and

assert time can only be set to zero using the Modzoom screens. When the registers

in this example are echoed, zeros will appear but the actual content in the module

will be unchanged from previous values. In this example, Counter 2 is disabled and

its outputs and timed assert have not been selected. Registers 400204 - 6 have no

meaning.

After the module executes the Configure and Load Value’s commands, they are

echoed in the I/O mapped 3X registers except for the command register’s low 8 bits.

Command execution time by the module is 1 ms. Actual time between the 4X

on User Logic and hardware configuration. An echo of the Configuration command

registers would appear as follows:

Response for Configuration Command

The following table shows the echo response for the configuration command.

Read Input Counter Command

The following table shows the read input registers.

When this command is issued, the content of the input pulse counter is retrieved.

The 3X register content would appear as shown in the following table.

300001 0100

300002 0000

300003 3100

300004 0000

300005 0000

300006 0000

40301 0300 READ INPUT COUNTER command

40302 0000

Not used by this command

40303 0000

40304 0000

40305 0000

40306 0000