4.3 OPERATOR MODE DISPLAYS 4-12
4.4 TUNING THE CONTROLLER MANUALLY 4-13
4.4.1 Controllers Fitted with Output 1 Only 4-13
4.4.2 Controllers Fitted with Output 1 and Output 2 4-14
4.5 SELF-TUNE AND PRE-TUNE FACILITIES 4-15
4.6 EXIT FROM SET UP MODE 4-15
5 RS485 SERIAL COMMUNICATIONS (ASCII) 5-1
5.1 RS485 COMMUNICATIONS 5-1
5.2 COMMUNICATIONS ENABLE/DISABLE 5-1
5.3 SELECTION OF COMMUNICATIONS CHANNEL ADDRESS 5-1
5.4 PHYSICAL REQUIREMENTS 5-1
5.4.1 Character Transmission 5-1
5.4.2 Line Turn-Round 5-1
5.4.3 Communications Protocol 5-2
5.4.4 Type 1 Message 5-4
5.4.5 Type 2 Message 5-5
5.4.6 Type 3 Message 5-5
5.4.7 Type 4 Message 5-6
5.5 INDIVIDUAL PARAMETERS 5-6
5.5.1 Input Parameters 5-6
5.5.2 Output Parameters 5-7
5.5.3 Setpoint Parameters 5-9
5.5.4 Alarm Parameters 5-9
5.5.5 Tuning Parameters 5-10
5.5.6 Status Parameters 5-11
5.6 ERROR RESPONSE 5-11
6 RS485 SERIAL COMMUNICATIONS (MODBUS) 6-1
6.1 INTRODUCTION 6-1
6.2 MODBUS FUNCTIONS SUPPORTED 6-1
6.3 MESSAGE FORMATS 6-1
6.4 PARAMETER NUMBERS 6-6
7 CONFIGURATION MODE 7-1
7.1 ENTRY INTO CONFIGURATION MODE 7-1
7.2 HARDWARE DEFINITION CODE 7-2
7.3 CONFIGURATION MODE PARAMETERS 7-3
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