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IM 04L21B01-17EN
Using the Serial Communication Interface (/C2 and /C3 Options)
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3
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6
App
Index
2.5 Using the Modbus Slave Function
The FX is used as a Modbus slave.
For the Modbus specifications, see section 6.3.
Setting the Serial Communication
Select Modbus as a protocol on the Basic settings. For detail, see section 2.4, “Setting
the Serial Communication.”
Reading/Writing the FX Data on Another Device
Another device (master device) sends commands to the FX to read the FX data or write
data to the FX. You can perform some operations, such as memory start, by writing in the
registers.
For the function codes that the FX supports and the FX registers that the master device
can access, see “Modbus Server Function” in section 6.3.
- Communication Interface 1
- (/C2, /C3, /C7) 1
- Trademarks 3
- Revision History 3
- WARNING 4
- CAUTION 4
- Using the Operation Keys 5
- Contents 6
- Modbus Client 9
- Modbus Server 10
- Setting/Measurement Server 11
- FTP Server 12
- FTP Client 13
- Maintenance/Test Server 13
- Instrument Information Server 13
- User registration 14
- • Administrator 14
- Web Server 15
- E-mail Transmission 16
- SNTP Server/Client 17
- DHCP Client 17
- Other Functions 17
- Interface 18
- 1.3 Connecting the FX 19
- Releasing Network Information 23
- Setting the keepalive 24
- 1.4 Sending E-mail Messages 25
- E-mail Test 28
- E-mail Format 29
- Scheduled E-mail Format 30
- • Subject 30
- System Mail (Error) Format 32
- Report Mail Format 33
- Test E-mail Format 34
- Setting the Web server 35
- Port Number 35
- Setting the Web page 35
- Page Type 36
- Setting the monitor page 36
- Setting the operator page 36
- Monitoring with a Browser 37
- Contents of the Monitor Page 38
- Refreshing the page 38
- Contents of the Operator Page 39
- • Trend and Historical Trend 39
- • Other Screens 39
- All Channel Display 40
- Specify a message number 41
- FX from a PC 42
- When Using the Login Function 43
- Other Files from the FX 44
- Testing the FTP Transfer 46
- 1.8 Synchronizing the Time 47
- Setting the SNTP Server 48
- Setting the Modbus Server 49
- Data to Other Devices 51
- Examples of Setting Commands 53
- • Example 54
- • Communication Conditions 55
- • Communication Status 55
- Resuming Command Transmission 56
- Data Dropout 56
- Measured data 57
- About the Port Number 58
- Setting Command 59
- Modbus Master 65
- Modbus Slave 66
- Setting/Measurement Function 66
- 2.3 Connecting the FX 68
- Handshaking 69
- • OFF-OFF 69
- • XON-XON 70
- • XON-RS 70
- • CS-RS 70
- Connection 71
- Connecting to the host device 71
- • Four-wire system 72
- • Two-wire system 72
- CAUTION 73
- Connecting to the FX 82
- 3.1 Command Syntax 83
- Delimiter 84
- Sub Delimiter 84
- Terminator 84
- 3.2 List of Commands 86
- Control Commands 88
- Basic Setting Commands 89
- Output Commands 90
- 3.3 Setup Parameters 91
- IM 04L21B01-01EN 92
- TJ Sets memory sampling 96
- SA Sets an alarm 97
- SZ Sets a zone 99
- 3.4 Setting Commands 100
- TF Sets a data file name 101
- SD Sets the date and time 101
- TD Sets daylight saving time 101
- TT Sets the trend display 101
- Commands 103
- TQ Sets a timer 104
- TK Sets a match time timer 104
- TU Sets an event action 105
- IM 04L21B01-17EN 107
- Setting the low-cut power 108
- SM Sets the custom menu 109
- Setting the function menu 111
- 3.5 Control Commands 112
- 3.6 Basic Setting Commands 116
- Sets alarm hysteresis 118
- RN Sets basic login 120
- RP Sets user limitations 120
- /PWR1 options) 120
- 3.8 Output Commands 130
- (Setting, measured, and 130
- FF Outputs FIFO data 131
- FU Outputs user levels 132
- ESC O Opens an instrument 133
- ESC C Closes an instrument 133
- 4.1 Response Syntax 137
- Text Output 138
- Binary Output 138
- Calculating the Sum Value 140
- Sample Program 140
- • Example 143
- Syntax 143
- Example 143
- Measured and Computed Data 144
- • Syntax 145
- • Example 1 145
- Communication Log 146
- FTP Client Log 148
- Operation Error Log 149
- Login Log 150
- Web Operation Log 151
- E-mail Log 153
- SNTP Log 154
- DHCP Log 155
- Modbus Communication Log 157
- Alarm Summary 158
- Message Summary 159
- Status Information 160
- Ethernet Information 161
- File List 162
- Check Disk 163
- User Information 164
- Number of Blocks 166
- Number of Bytes 166
- • Block Member 167
- Special Data Values 167
- Format Details 168
- Block Details 168
- Manual Sampled Data 169
- Report Data 169
- Response 170
- Output Example 170
- Status Information 1 172
- Status Information 2 172
- Status Information 3 172
- Status Information 4 173
- Status Information 5 to 8 173
- Blank Page 174
- Basic Specifications 175
- RS-232 Specifications 176
- RS-422A/485 Specifications 176
- Modbus Client Function 177
- Command 178
- Modbus Server Function 180
- • Common Items 181
- • Details 181
- Bit string 182
- 16-bit signed integer 182
- • Operating Devices 183
- List of Registers 184
- How to Use 186
- Modbus Master Function 188
- Modbus Slave Function 189
- Communication 191
- Appendix 2 Login Procedure 193
- Russian Characters 195
- Korean Characters 196
- Internal Memory 197
- Are there more file lists? 198
- Overview of the FIFO Buffer 199
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