ABB Uvisor SF910i User Manual page 101

15 Serial Interfaces
15.2 MODBUS Protocol
Input Registers (Process Values)
The input registers provide the ability to read the scanner process values to a MODBUS
master. These values are read using MODBUS function code 4. MODBUS master cannot
write to these values. The process values use the following MODBUS registers, including
spare registers provided for future expansion.
These registers are 16-bits long. Since all the informations contained in this table is no
longer than 8 bits, information is packed into two values every 1 bits to make the data
transfer faster.
This information can be read by any MODBUS master conveniently configured.
Table 15.3: Process Value Registers (MODBUS)
Flame status (0 = no flame and 1 = flame)
Flame status for second sensor, if dual (0 = no flame and 1 = flame)
Flame status for second flame relay, if single (0 = no flame and 1 = flame)
Spare
Active Function Set for Flame-relay
Active Function Set for dual sensor of Safe-relay as second Flame-relay
Composed scanner fault
Combined scanner fault
Fault on sensor 1 (0 = no fault)
Fault on sensor 2 (0 = no fault)
Program change status (counter of the times configuration are changed, between
0 and 100, then rolls to zero)
Spare
Intensity for sensor 1
Flicker-Frequency for sensor 1
AC-Amplitude for sensor 1
Quality for sensor 1
Combustion index for sensor 1 (not supported)
Spare
Intensity for sensor 2
Flicker-Frequency for sensor 2
AC-Amplitude for sensor 2
Quality for sensor 2
8VZZ005286 B
Scanner Process Values
Register Addresses
(decimal)
5100 Lo
5100 Hi
5101 Lo
5101 Hi
5102 Lo
5102 Hi
5103 Lo
5103 Hi
5104 Lo
5104 Hi
5105 Lo
5105 Hi
5106 Lo
5106 Hi
5107 Lo
5107 Hi
5108 Lo
5108 Hi
5109 Lo
5109 Hi
5110 Lo
5110 Hi
101