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4-82 Series 90-30/20/Micro Programmable Controllers Reference Manual – September 1998 GFK-0467K
4
Note
Coil checking, for the BITSEQ function, checks for 16 bits from the ST
parameter, even when LEN is less than 16.
Valid Memory Types:
Parameter flow %I %Q %M %T %S %G %R %AI %AQ const none
address •
enable •
R •
DIR •
STEP • • • • • • • • • •
ST • • • • •† • • • • •
ok • •
• Valid reference or place where power may flow through the function.
† SA, %SB, %SC only; %S cannot be used
Example:
In the following example, the sequencer operates on register memory %R0001. Its static data is
stored in registers %R0010, %R0011, and %R0012. When CLEAR is active, the sequencer is reset
and the current step is set to step number 3. The first 8 bits of %R0001 are set to zero.
When NXT_SEQ is active and CLEAR is not active, the bit for step number 3 is cleared and the bit
for step number 2 or 4 (depending on whether DIR is energized) is set.
| _____
|NXT_SEQ | |
|——| |———| BIT_|—
| | |
| | SEQ |
| CLEAR | |
|——| |———|R |
| | LEN |
| DIRECT |00008|
|——| |———|DIR |
| | |
| | |
| CONST —|STEP |
| 00003 | |
| | |
| %R0001—|ST |
| |_____|
| %R0010
|