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GFK-0467K Chapter 4 Series 90-30/20/Micro Instructions Set 4-81
4
_____
| |
(enable) —| BIT
_
|— (ok)
| |
| SEQ |
| |
(reset) —|R |
| LEN |
|00001|
(direction) —|DIR |
| |
| |
(number) —|STEP |
| |
| |
(starting address) —|ST |
| |
|_____|
(address) - Enter the beginning address here.
The control word stores the state of the boolean inputs and outputs of its associated function block,
as shown in the following format:
15
14
13
12
11
10
9
8
6
5
4
3
2
1
0
OK (status input)
Reserved
Reserved
7
EN (enable input)
Note
Bits 0 through 13 are not used. Also, note that bits need to be entered as 1 through 16, NOT 0
through 15 in the STEP parameter.
Parameters:
Parameter Description
address Address is the location of the bit sequencer’s current step, length, and the last enable and
ok statuses.
enable When the function is enabled, if it was not enabled on the previous sweep and if R is not
energized, the bit sequence shift is performed.
R When R is energized, the bit sequencer’s step number is set to the value in STEP
(default = 1), and the bit sequencer is filled with zeros, except for the current step
number bit.
DIR When DIR is energized, the bit sequencer’s step number is incremented prior to the shift.
Otherwise, it is decremented.
STEP When R is energized, the step number is set to this value.
ST ST contains the first word of the bit sequencer.
ok The ok output is energized whenever the function is enabled.
LEN LEN must be between 1 and 256 bits.