GE 90-30/20/Micro manual Dir, Step

4

_____

(enable)	(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:

1 5 1 4 1 3 1 2 1 1 1 0

9

8

7 6 5 4

R e s e r v e d

O K ( s t a t u s i n p u t )

E N ( e n a b l e i n p u t )

3 2 1 0

R e s e r v e d

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.

GFK-0467K Chapter 4 Series 90-30/20/Micro Instructions Set 4-81