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V700-L21
User's Manual
Section 4
4.2 Protocol specifications
Section 4
SECS Protocol Specifications
4.2 Protocol specifications
(1) Character structure
Start bit (1) + data bits (8) + stop bit (1) *Per SEMI E4
(2) Protocol parameters
(3) Duplicate block detection
The header of correct block received immediately before is compared with that of currently received
block in order to detect a duplicate block. Whether or not this detection is enabled can be set in setup
mode.
(4) Multiblock
The receiver side supports multiple blocks (max. 128 blocks).
The transmitter side uses multiple blocks.
(5) Message size
The maximum size of a message that can be received is 32 kbytes.
(6) Interleaving
The receiver side supports interleaving and block interleaving.
The transmitter side uses interleaving and block interleaving.
The maximum number of simultaneously opened transactions is 16.
If this maximum number is exceeded, an SxF0 (abort transaction) signal is triggered.
(7) Device ID
The number of device ID used is one, and a device ID is specified in setup mode.
(8) Block No.
In the single block case, the block No. is 1 or 0. In the multi-block case, the possible block No. ranges
from1 to 128. The block No. for single block case is specified in setup mode.
No. Symbol Name Default Range Resolution
1 BAUD Baud rate
9600 1200,2400,4800,9600,19200,
38400,57600,115200 bps
-
2 DEVID Device ID 0 0 - 32767 1
3 T1 Inter-character timeout 0.5s 0.1 - 10s 0.1s
4 T2 Protocol timeout 10s 0.2 - 25s 0.2s
5 T3 Replay timeout 45s 1 - 120s 1s
6 T4 Inter-block timeout 45s 1 - 120s 1s
7 RTY Retry limit 3 0 - 31 1
8 M/S Master/slave Master - -
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