Further information 
12 Further information 
12.1   Modbus RTU Serial Communications 
Refer to Honeywell document 51-52-25-66 Modbus RTU Serial Communications 
User Manual. 
12.2   Modbus Messaging on TCP/IP 
Refer to Honeywell document 51-52-25-121 MODBUS Messaging on TCP/IP 
Implementation Guide.  
Refer to Honeywell document 51-52-05-01 How to Apply Digital Instrumentation 
in Severe Electrical Noise Environments. 
12.3   How to Apply Digital Instrumentation in Severe Electrical 
Noise Environments 
 
222  UDC3200 Universal Digital Controller Product Manual  12/04