Datasheet

4.1 Control/Sense Commands
C141-C008 4-65
d. RHA (require hard address)
This bit is possible to specify and operates according to the specification.
This bit specifies settings concerning enabling or disabling the Soft Address.
"1": In Loop Initialization, even if a hard address cannot be fixed, a soft
address is not used.
In this case, the IDD enters a Non-participating State.
In the Non-participating State, if Loop Initialization is detected, try
fixing a hard address again.
"0": In the Loop Initialization process, try fixing a soft address.
e. DLM (disable loop master)
This bit is possible to specify and operates according to the specification.
This bit specifies enabling or disabling of the Loop Master operation.
"1": − The IDD does not become the Loop Master.
− The IDD only resends the LISM frames that it receives.
− The IDD Permits the INIT to become the Loop Master.
"0": − The IDD itself is permitted to become the Loop Master.
f. DDIS (disable discovery)
This bit is possible to specify and operates according to the specification.
This bit specifies settings concerning Port/Address Discovery.
"1": − Address or Port Discovery is not necessary after Loop Initialization.
− When Loop Initialization is completed, task processing is restarted.
"0": − Before the INIT restarts task processing, it must wait for Address
Discovery or Port Discovery.
g. PLPB (prevent loop port bypass)
This bit is possible to specify and operates according to the specification.
This bit specifies settings concerning Loop Port bypass (LPB)/Loop Port
Enable (LPE).
"1": − Ignores Loop Port bypass (LPB)/Loop Port Enable (LPE) Primitive.
"0": − Receiving Loop Port bypass (LPB)/Loop Port Enable (LPE)
Primitive, it controls Port Bypass circuit according to the received
Primitive.