[ Vfdmod ] An easy VFD control over MODBUS RTU

Opening /dev/ttyUSB0 at 9600 bauds (N, 8, 1)

vfdmod: reading 'spindle.rpm-out' from address 4096 (0x1000)...
[01][03][10][00][00][01][80][CA]
Waiting for a confirmation...
<01><03><02><49><70><8E><30>
vfdmod: returned value is 18800 (0x4970)

vfdmod: setting command speed value to 20 (0x0014)...
[01][10][7F][00][00][01][02][00][14][28][98]
Waiting for a confirmation...
<01><10><7F><00><00><01><18><1D>

vfdmod: setting control word value to 136 (0x0088)...
[01][10][7F][00][00][01][02][00][88][28][F1]
Waiting for a confirmation...
<01><10><7F><00><00><01><18><1D>

vfdmod: reading 'spindle.rpm-out' from address 4096 (0x1000)...
[01][03][10][00][00][01][80][CA]
Waiting for a confirmation...
<01><03><02><49><70><8E><30>
vfdmod: returned value is 18800 (0x4970)

vfdmod: setting command speed value to 20 (0x0014)...
[01][10][7F][00][00][01][02][00][14][28][98]
Waiting for a confirmation...
<01><10><7F><00><00><01><18><1D>

vfdmod: setting control word value to 136 (0x0088)...
[01][10][7F][00][00][01][02][00][88][28][F1]
Waiting for a confirmation...
<01><10><7F><00><00><01><18><1D>

# **********************************************************
#
# Predefined (required) groups start here! These groups are:
#
# [Common]
# [RS485]
# [Control]
# [SpindleRpmIn]
# [SpindleRpmOut]
#
# **********************************************************

[Common]

# HAL component name. Default value is 'vfdmod'.
;ComponentName=vfdmod

# A maximum spindle speed shall be greater than zero.
MaxSpeedRPM=24000

# A minimum spindle speed shall be greater than zero
# and lower than (or equal to) MaxSpeedRPM.
MinSpeedRPM=2

# A maximum allowed difference between command speed and output speed
# to set HAL 'at-speed' output to TRUE.
# 0.00 = 0%
# 1.00 = 100%
# Default value is 0.05 (5%).
AtSpeedThreshold=0.25

[RS485]

# VFD slave address.
SlaveAddress=1

# Serial device system path.
SerialDevice=/dev/ttyUSB0

# Communication speed.
BaudRate=9600

# Data bits: always 8.
;DataBits=8

# Parity: 'N' for none (default), 'E' for even, 'O' for odd.
;Parity=N

# Stop bits: 1 (default) or 2.
;StopBits=1

# Loop delay in milliseconds, default value is 200 ms.
# Range: 0 ... 10000.
LoopDelay=10000

# Delay in characters at front of every MODBUS request.
# MODBUS specification recommends at least 3.5 characters,
# so default value must be 4.
# Increase this value if communication errors happen.
# Range: 0 ... 100.
ProtocolDelay=94

# A minimum count of successfull requests to set HAL 'is-connected' output
# to TRUE. Default value is 10. Range: 1 ... 100.
;IsConnectedDelay=10

# Comma separated critical errors that call reconnection event.
# For example: error code 5 occures when SerialDevice has been
# physically disconnected.
;ConnectionErrorList=5

# Delay in milliseconds between reconnection attempts, this parameter
# is active when ConnectionErrorList is not empty. Default value is 1000 ms.
# Range: 0 ... 10000.
;ConnectionDelay=1000

[Control]

# Function code:
# 0x06 - write single register (default).
# 0x10 - write multiple registers.
# 0x05 - write single coil.
# 0x0F - write multiple coils.
;FunctionCode=0x06
FunctionCode=0x10

# **********************************************************
# Values below are active when FunctionCode is 0x06 or 0x10.
# **********************************************************

# An address of the control register.
Address=0x7F00

# A value to run spindle forward.
RunForwardValue=0x0081

# A value to run spindle reverse.
RunReverseValue=0x0085

# A value to reset a fault state.
# If this parameter is commented then fault reset feature will be disabled.
;FaultResetValue=0x04A8

# A value to stop spindle.
StopValue=0x0088


[SpindleRpmIn]

# Function code:
# 0x06 - write single register (default).
# 0x10 - write multiple registers.
;FunctionCode=0x06
FunctionCode=0x10

# An address of the command speed (or frequency) register.
Address=0x7F00

# Multiplier and Divider are integer values to correct command speed value
# before it will be written to command speed register.
# Corrected command speed = (command speed) x Multiplier / Divider.
# Use both (Multiplier & Divider) to reach float coefficient.
Multiplier=10
;Divider=1

[SpindleRpmOut]
FunctionCode=0x03

# An address of the output speed (or frequency) register.
Address=0x1000

# Multiplier and Divider are integer values to correct output speed value
# after it has been read from output speed register.
# Corrected output speed = (output speed) x Multiplier / Divider.
# Use both (Multiplier & Divider) to reach float coefficient.
Multiplier=100
;Divider=1

vfdmod: reading 'spindle.rpm-out' from address 8203 (0x200B)...
[01][03][20][0B][00][01][FE][08]
Waiting for a confirmation...
<01><83><03><01><31>
ERROR Illegal data value

vfdmod: setting command speed value to 5 (0x0005)...
[01][06][20][01][00][05][13][C9]
Waiting for a confirmation...
<01><86><03><02><61>
ERROR Illegal data value

#!/bin/bash
for i in {0..65535}
do
   mbpoll -b 9600 -1 -P none -r $i -t 4 -v /dev/ttyUSB0
done

chris@cnc:~$ ./test.sh &> out.txt
chris@cnc:~$ grep "failed" out.txt | wc -l
65535

[Control]

Address=0x2000
RunForwardValue=0x0012
RunReverseValue=0x0022
FaultResetValue=0x0080
StopValue=0x0001

vfdmod: setting control word value to 1 (0x0001)...
[0A][06][20][00][00][01][42][B1]
Waiting for a confirmation...
<0A><06><20><00><00><01><42><B1>