Rice Lake 920i Programmable HMI Indicator/Controller - Profibus DP Interface - Manual (Page 8)

4 520/720i/820i/920i Profibus DP Installation and Programming Manual
2.3 Address and Termination Switches
The Profibus Interface address and bus termination
are set using switches on the Profibus module.
Figure 2-6 shows the address and termination
switches.
Figure 2-6. Profibus Module Switches
Termination Switch
If the Profibus Interface is the first or last module on
the bus, set the termination switch ON. Otherwise, set
the switch OFF to disable bus termination.
Address Switches
Two rotary switches are used to set the decimal node
address, 1–99, of the Profibus Interface (Address 0 is
reserved.) Note that the node address cannot be
changed during operation.
The left switch shown in Figure 2-6, marked x10 , sets
the tens digit; the right switch, x1 , sets the units digit.
(For example, to set a decimal address of 14, set x10 =
1, and x1 = 4 .)
2.4 LED Status Indicators
An LED array on the Profibus module provides status
information for troubleshooting. LEDs 2 and 3
provide status indication for the Profibus module;
LED 4 provides Profibus diagnostic information. LED
1 is reserved.
Figure 2-7. Profibus Status LED Module
Table 2-2 summarizes the function of the status LEDs.
A single bi-color LED on the surface of the Profibus
m o d u l e p r o v i d e s d i a g n o s t i c i n f o r m a t i o n f o r
debugging the module itself. Table 2-3 lists the
indications provided by the debugging LED.
x1
x10
Termination
switch
Address
switches
LED Status Description
LED 2
Online Off Not online
Steady Green Module is online
LED 3
Offline Off Not offline
Steady Red Module is offline
LED 4
Fieldbus
Diagnostics
Off No diagnostics
Flashing Red,
1 Hz
Configuration error
Flashing Red,
2 Hz
User parameter data error
Flashing Red,
4 Hz
Initialization error
Table 2-2. Status LED Indications
Status Description
Off No power
Red, 4Hz DPRAM check fault
Red, 2Hz ASIC and FLASH ROM check fault
Red, 1Hz RAM check fault
Green, 2Hz Module not initialized
Green, 1Hz Module initialized and running
Table 2-3. Debugging LED Indications
1
2
3
4
Fieldbus
diagnostics
Online
Offline