En-8
MODBUS
convertor
address
DIP Switch Setting
ON:
●
/ OFF:
○
SET5-1 SET5-2 SET5-3 SET5-4 SET4-1 SET4-2 SET4-3 SET4-4
177
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178
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179
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180
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181
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182
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183
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184
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185
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186
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187
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188
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189
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190
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191
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192
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193
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194
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195
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196
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197
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198
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199
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200
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201
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202
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203
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204
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205
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206
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207
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208
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209
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210
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211
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212
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213
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214
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215
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216
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217
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218
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219
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220
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221
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222
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223
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224
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225
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226
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227
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228
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229
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230
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231
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232
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233
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234
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235
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236
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237
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238
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239
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240
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241
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242
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243
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244
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245
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246
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247
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(
: Factory setting)
(6) MODBUS communication setting: Baud rate setting (SET6-4)
ON: 19200bps
OFF: 9600bps (Default)
(7) MODBUS communication setting: Parity setting (SET6-3)
ON: odd
OFF: even (Default)
* When the STOP bit setting is “2bit,” parity is set to “None” regardless
of the setting of this switch.
(8) MODBUS communication setting: Stop bit setting (SET6-2)
Stop bit can be set (1 bit or 2 bit).
ON: 2bit
OFF: 1bit (Default)
(9) MODBUS communication setting: MODBUS communication terminal
resistance (SET7-4)
MODBUS communication terminal resistance can be set (Valid or
invalid).
Terminal resistance: 120Ω
Set the terminal resistances as necessary.
For MODBUS system, terminal resistances are necessary at the both
ends of communication line. (Total 2 terminal resistances)
Set the terminal resistances at the both ends to be valid and set the
terminal resistances other than at the both ends to be invalid.
ON: Terminal resistance valid
OFF: Terminal resistance invalid (Default)
* The switches from (5) to (8) are read at the time of power-on. Even if
these switches are changed after power-on, the setting is not reflected.
(10) Unused SW
SET2-2, SET6-1, SET7-1 to 3: Not used
All Default settings: “OFF”
9. TURNING ON THE POWER
CAUTION
Check that the power supply voltage is within the specified range. If
the power supply voltage outside the specification is input, it will cause
trouble.
Recheck the wiring. Incorrect wiring will cause trouble.
(1) Check the wiring of MODBUS convertor.
(2) Check the wiring and switches of units connected to convertor before
tuning on the power.
(3) Check that the switches of MODBUS convertor are correct.
(4) Turn on the power for the MODBUS Convertor.
• The MODBUS Convertor is initialized for a period of approximately a few
seconds after the power is turned on.
LED1 (green), LED2 (orange), LED5 (green), and LED6 (orange) flash.
• After initial setting is completed, operation will be restarted automati-
cally. LED1 (green) and LED5 (green) light.
* MODBUS Convertor does not operate during initialization.
If an error occurs, the LED1, LED2, LED3, or LED5, LED6, LED7 lights
or flashes.
