Toho Electronics TRM-10C Instruction Manual page 6

8. COMMUNICATIONS ......................................................... 85
8.1 General Description.................................................................... 85
8.1.1 General Description of Functions ........................................ 85
8.1.2 Transmission Specifications ................................................ 85
8.2 Original Protocol ......................................................................... 86
8.2.1 Data Construction ................................................................. 86
8.2.2 Opening/Closing the Link ..................................................... 86
8.2.3 Outputting the Process Variable Data ................................. 87
8.2.4 Outputting the Unit and Decimal Point Position Data ......... 90
8.2.5 Outputting the Status ............................................................ 91
8.2.6 Data Reception Example ..................................................... 92
8.3 Modbus RTU Protocol ............................................................... 93
8.3.1 Data Construction ................................................................. 93
8.3.2 Function Codes .................................................................... 93
8.3.3 Error Response .................................................................... 93
8.3.4 Reading from the Input Register Area ................................ 94
8.3.5 Reading from or Writing to the Holding Register Area ...... 97
9. MAINTENANCE ................................................................. 98
9.1 Inspection .................................................................................... 98
9.2 Cleaning ...................................................................................... 98
9.3 Replacing Consumables ............................................................ 99
9.4 Adjust Dot Printing Position (Point Calibration) ......................... 99
9.5 Calibration (Data Calibration) ..................................................... 99
(1) Calibration of Voltage ......................................................... 100
(2) Calibration of Resistance Temperature Detector .............. 100
(3) Calibration of Reference Junction Compensation ............ 101
10. TROUBLESHOOTING .................................................. 102
10.1 Troubleshooting ..................................................................... 102
10.1.1 Trouble Items ................................................................... 102
10.1.2 When the Recorder Dose not Work at All ...................... 102
10.1.3 When there is a Big Error ................................................ 103
10.1.4 When the Trend Recording Deflected ............................ 103
10.1.5 When Records Nothing ................................................... 104
10.1.6 When Recording is Faint ................................................. 104
10.1.7 When the Chart Paper is not fed at All ............................ 105
10.1.8 When the Chart Paper is not fed Properly...................... 105
10.2 Self Diagnostics Function (ERROR) .................................... 106
10.2.1 Self Diagnostic Items ....................................................... 106
10.2.2 Error Display ..................................................................... 107
11. SPECIFICATIONS .......................................................... 108
11.1 Common Specifications ......................................................... 108
11.1.1 Input Signal ....................................................................... 108
11.1.2 Performance and Characteristics .................................... 108
11.1.3 Structure ........................................................................... 109
11.1.4 Power Source ................................................................... 109
11.1.5 Normal Operating Conditions .......................................... 109
11.1.6 Alarm (Relay Output is Optional)......................................110
11.1.7 Safety Standard and EMI Standard .................................110
11.1.8 DI Function (Option) ..........................................................110
11.1.9 Paper-empty Detecting Function (Option) .......................110
11.2 Standard Setting Specifications ............................................. 111
11.2.1 Measurement Range ........................................................ 111
11.2.2 The Accuracy at the Computation ....................................114
(1) Scaling ..................................................................................114
(2) Square Root Computation ..................................................114
(3) Decade .................................................................................115
(4) Difference, Sum, and Average ............................................115
11.2.3 Individual Specifications ....................................................116
11.2.4 Standard Functions ...........................................................117
11.3 Standard Setting Functions ....................................................118
11.3.1 Standard Setting Functions ..............................................118
11.4 Optional Functions ..................................................................118
11.4.1 Remote Function of DI ......................................................118
11.4.2 Alarm Board ......................................................................118
11.4.3 Communication Unit .........................................................118
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