 |
| Place of Origin: | Japan |
| Brand Name: | Tamagawa |
| Certification: | CE |
| Model Number: | TS2014N181E32 |
| Minimum Order Quantity: | 1pcs |
|---|---|
| Packaging Details: | carton |
| Delivery Time: | in stock |
| Payment Terms: | T/T, Western Union, MoneyGram |
| Supply Ability: | 100pcs/week |
| TAMAGAWA: | TAMAGAWA | TS2014N181E32: | TS2014N181E32 |
|---|---|---|---|
| Japan: | Japan | Material: | Iron |
| Color: | Black | Temperature: | 40-90 |
| Wire: | Wire | Dimension: | 80mm |
TS2014N181E32
| DSTBLK OUT VARIANT READ_DBL: Pointer to the destination data block in work memory | values (initial values) are always stored in load memory, and the current values are always stored in work memory. READ_DBL can be used to copy a set of start values from load |
| a DB is stored in both load memory (flash) and work memory (RAM). The start | memory to the current values of a DB in work memory that is referenced by your program. |
| RIT_DBL: Pointer to the destination data block in load memoryTypically, | You can use WRIT_DBL to update the start values stored in internal load memory or memory card from current values in work memory. |
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operations in flash memory (internal load memory
or memory card). WRIT_DBL should be used for infrequent updates like a production
process changes.
The data blocks used by READ_DBL and WRIT_DBL must have been previously created by
STEP 7 before you can use these instructions. If the source DB is created as a "standard"
type then the destination DB must also be the "standard" type. If the source data block is
created as an "optimized" type then the destination data block must also be the "optimized"
type.
If the DBs are standard, then you can specify either a tag name or a P# value. The P# value
allows you to specify and copy any number of elements of the specified size (Byte, Word, or
DWord). Thus, you can copy part or all of a DB. If the DBs are optimized, you can only
specify a tag name; you cannot use the P# operator. If you specify a tag name for either
standard or optimized DBs (or for other work-memory types), then whatever is referenced by
this tag name is copied. This could be a user-defined type, an array, or a basic element.
Type Struct can only be used by these instructions if the DB is standard, not optimized. You
must use a user-defined type (UDT) if it is a structure in optimized memory. Only a userdefined
type ensures that the "data types" are exactly the same for both the source and
destination structures.
Note
Using a structure (data type Struct) in an "optimized" DB
When using a Struct data type with "optimzed" DBs, you must first create a user-defined
data type (UDT) for the Struct. You then configure both the source and destination DBs with
the UDT. The UDT ensures that the data types within the Struct remain consistent for both
DBs.
For "standard" DBs, you use the Struct without creating a UDT.
READ_DBL and WRIT_DBL execute asynchronously to the cyclic program scan. The
processing extends over multiple READ_DBL and WRIT_DBL calls. You start the DB
transfer job by calling with REQ = 1 and then monitor the BUSY and RET_VAL outputs to
determine when the data transfer is complete and correct.
To ensure data consistency, do not modify the destination area during the processing of
READ_DBL or the source areaduring the processing of WRIT_DBL (that is, as long as the
BUSY parameter is TRUE). SRCBLK and DSTBLK parameter restrictions:
● A data block must have been previously created before it can be referenced.
● The length of a VARIANT pointer of type BOOL must be divisible by 8.
● The length of a VARIANT pointer of type STRING must be the same in the source and
destination pointers.
Recipes and machine setup information
You can use the READ_DBL and WRIT_DBL instructions to manage recipes or machine
setup information. This essentially becomes another method of achieving retentive data for
values that do not change often, although you would want to limit the number of writes to
prevent wearing out the flash prematurely. This effectively allows you to increase the amount
of retentive memory beyond that supported for the normal power-down retentive data, at
least for values that do not change often. You could save recipe information or machinesetup
information from work memory to load memory using the WRIT_DBL instruction, and
you could retrieve such information from load memory into work memory using the
READ_DBL instruction. Warning: that the source area is smaller than the destination area. The source data is copied
completely with the extra bytes in the destination area unchanged.
7000 Call with REQ = 0: BUSY = 0
7001 First call with REQ = 1 (working): BUSY = 1
7002 Nth call (working): BUSY = 1
8051 Data block type error
