Timer Values | B&B Electronics 232XS5 guide

SetTV$ = CHR$(27) + CHR$(2) +”T” + “6”

The “T” tells the 232XS5 it is the set timer value command and the “6” indicates which timer value to use.

Table 7 - Timer Values

Data Byte	Value

0	timer disabled
1	10ms
2	25ms
3	100ms
4	500ms
5	1 s
6	5 s
7	30 s
8	1 min.
9	5 min.

The Set Timer Mode command tells the 232XS5 whether the time set by the Set Timer Value command will be used to determine the time-out of an inactive port, or the length of time switching commands are ignored. The third byte of the Set Timer Mode command is an ASCII “M”. If the data byte (fourth byte) is an ASCII “0”, zero (default), the timer will be setup as an inactivity timer. For example, sending the following string to the 232XS5 will set up the timer as an inactivity timer (assuming programmable character is the factory default of 2).

SetTM$ = CHR$(27) + CHR$(2) +”M” + “0”

The “M” tells the 232XS5 it is the set timer mode command and the “0” indicates to set up the timer as an inactivity timer. When the timer is configured as an inactivity timer, the 232XS5 will monitor the data lines (TD & RD) for data. If there is no activity for the specified timer value, the slave port that is connected to the master port will be disconnected. In smart switch mode, the inactivity timer can be used to prevent the preamble codes from being received by the slave devices. In port combiner mode, the inactivity timer can be used to prevent devices from tying up the master port. For example (port combiner mode), all the slave ports have their handshake lines asserted. The device on Port C has its handshake line asserted and is currently connected to the master port, but has not been transmitting or receiving data. When the inactivity timer expires, Port C will be disconnected and the next slave port will then be connected to the master port (following the first-come-first-served rule). Port C will then be placed at the “end of the line”.

232XS2497 Manual

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Five Port Expandable Smart Switch, 232XS5 specifications

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