Toshiba PROSEC T3H Manual De Usuario

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User’s Manual   
41
 
2. Expanded Functions 
 
 
 
2.3.2 
TOSLINE-S20LP (loop) support 
 
In addition to the standard bus connection type TOSLINE-S20 (here called S20), the 
optical loop connection type TOSLINE-S20LP (here called S20LP) can be used with 
the T3H. (SN325: T3H station module of S20LP) 
By using the S20LP, high speed control-data linkage is available as same as the S20. 
Furthermore, peer-to-peer communication between T3H’s becomes available via 
S20LP. 
 
• 
Up to two S20LP can be installed on a T3H. (S20LP and S20 total) 
 
• 
The S20LP has 4 k words of scan transmission capacity. 
The leading 2 k words of the scan memory can be assigned to T3H’s link register 
(W). And the following 2 k words can be read/written by using XFER instruction. 
 
• 
The S20LP does not have the scan healthy map. Therefore, SW128 to SW255 are 
not used for the S20LP. 
 
• 
The S20LP has the loop map which indicates loop connection status of each 
station. This loop map can be read by using READ instruction. 
 
• 
By using SEND and RECV instructions, any register data of a T3H can be sent to 
other T3H, and any register data of other T3H can be read into a T3H, via S20LP. 
(peer-to-peer communication) 
 
 
 
 
 
 
NOTE
(1)  The S20LP is under development. 
(2)  For details of the S20LP, refer to the separate manual for S20LP.