User’s Manual 33
2. Expanded Functions
When “GLOBAL” setting is used, the link registers of “GLOBAL” setting block ar e
assigned to both CH1 and CH2 S20’s.
T3H’s link register Block Setting CH1 S20 CH2 S20
W CH1 CH2 scan memory scan memory
W0192 - W0255 4 LINK 0192 - 0255 -
W0256 - W0319 5 GLOBAL 0256 - 0319 0256 - 0319
W0320 - W0383 6 GLOBAL 0320 - 0383 0320 - 0383
W0384 - W0447 7 GLOBAL 0384 - 0447 0384 - 0447
W0448 - W0511 8 GLOBAL 0448 - 0511 0448 - 0511
W0512 - W0575 9 LINK 0512 - 0575 -
W1216 - W1279 20 LINK 0192 - 0255
W1280 - W1343 21
W1344 - W1407 22 - -
W1408 - W1471 23
W1472 - W1535 24
W1536 - W1599 25 LINK 0512 - 0575
• The block s 1 - 16 are dedicated to the CH1 S20, and the blocks 17 - 32 are
dedicated to the CH2 S20.
It is not allowed to assign the blocks 1 - 16 to CH2, and blocks 17 - 32 to CH1.
• For the block s set as “LINK” or “GLOBAL”, the T3H performs data read from S20
(for data receive area) and data write to S20 (for data send area).
The data transfer direction (read or write) is automatically decided by the T3H
according to the S20’s receive/send setting.
• For the block s set as “GLOBAL”, the data transfer is as follows.
1) If CH1 is receive and CH2 is send;
CH1 receive data is read and written into both W register and CH2.
2) If CH1 is send and CH2 is receive;
CH2 receive data is read and written into both W register and CH1.
3) If both CH1 and CH2 are send;
W register data is written into both CH1 and CH2.
4) If both CH1 and CH2 are receive;
The receive data of “GLOBAL” setting channel is read and stored in W register.
NOTE In case of TOSLINE-S20LP, it has 4096 words of scan memory. The
leading 2048 words can be assigned straight to W register. The following
2048 words can be accessed by using XFER instruction.