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15 Serial Interfaces
15.2 MODBUS Protocol
Table 15.4: Channel Configuration Parameter Registers (MODBUS)
(Continued)
Function Set Switch (Off, through Serial Line, and through Digital Inputs)
Enable High Limit (NO/YES)
Enable AC Amplitude (NO/YES)
Unit ID
Elevation ID
Burner ID
Function-set ID A
Function-set ID B
AO Output mode
AO Output source (Intensity, Frequency, AC-Amplitude, Quality.CI)
Spares
Function-set ID C
Function-set ID D
These values are read using MODBUS function code 3 and written to using MODBUS
function code 6 or 16.
The parameters require 64 MODBUS registers for the scanner configuration (including
spare registers provided for future expansion), and 40 registers for each of the four
function-sets (including spare registers). This is a total of 230 registers per scanner. This
means that two MODBUS requests are required to access all the parameters for one
SF910i scanner.
The user must update an entire Tuning Function-Set in one MODBUS request to ensure
that all the parameters are consistent and that all are accepted or all are rejected.
Table 15.5: Tuning Function-Set Parameter Registers (MODBUS)
Function-set A
Intensity Trip Point Pull-In (IP)
Intensity Trip Point Drop-Out (ID)
Intensity Trip Point High (IH)
Intensity Normalization (IN)
8VZZ005286 B
Scanner Configuration Parameters
Tuning Function-Set Parameters
Register Addresses
4011
4012
4013
4014-4017
4018-4021
4022-4025
4026-2029
4030-4033
4034
4035
4036-4056
4056-4059
4060-4063
Register Addresses
4070
4071
4072
4073
103
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Troubleshooting
