Sterling SSL Manuel D’Utilisation

 

8  SPI Enable/Disable & Loopback Test 

When the expanded service menus are enabled, an additional parameter becomes available on 
this menu. Set this parameter to 

1

  to enable SPI communications. Set it to 

2

  to perform an 

internal self test. Disconnect all communication cables before performing the internal self-
test; no loopback cable is needed. 

 

Note: 

To exit the self-test, you’ll need to perform a complete reset: 

reapply power to the control while pressing both the 

 UP 

key and DOWN key together simultaneously. All parameters 
reset to the factory defaults so make a note of the parameter 
settings you want to retain. 

 

 

If the Series One Plus screen alternates displays of the numbers 

85

  and 

170

 , a self test is successful. This condition continues 

until you do a complete reset. During the test, the number 

85

 

continuously transmits out the port. When the controller receives 
an 

85

, it echoes a 

170

. 

9 SPI 

Each auxiliary device on an SPI network must be assigned a unique address to identify it to the 
IMM controlling the network. Do not assign the same address to any two auxiliary 
machines on the network, or line contention will occur. 

10  SPI Baud Rate 

The baud rate in bits per second (bps) is the data transmission rate. All units on the network 
must be set at the same baud rate. In general, this rate should be set to the fastest common 
speed available to the controllers on the network where satisfactory communication occurs.