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#!/usr/bin/env python3
#
# Simple pyprofibus example
#
# This example initializes an ET-200S slave, reads input
# data and writes the data back to the module.
#
# The hardware configuration is as follows:
#
# v--------------v----------v----------v----------v----------v
# | IM 151-1 | PM-E | 2 DO | 2 DO | 4 DI |
# | STANDARD | DC24V | DC24V/2A | DC24V/2A | DC24V |
# | | | | | |
# | | | | | |
# | ET 200S | | | | |
# | | | | | |
# | | | | | |
# | 6ES7 | 6ES7 | 6ES7 | 6ES7 | 6ES7 |
# | 151- | 138- | 132- | 132- | 131- |
# | 1AA04- | 4CA01- | 4BB30- | 4BB30- | 4BD01- |
# | 0AB0 | 0AA0 | 0AA0 | 0AA0 | 0AA0 |
# ^--------------^----------^----------^----------^----------^
#
import sys
sys.path.insert(0, "..")
import pyprofibus
def main(confdir=".", watchdog=None):
master = None
try:
# Parse the config file.
config = pyprofibus.PbConf.fromFile(confdir + "/example_et200s.conf")
# Create a DP master.
master = config.makeDPM()
# Create the slave descriptions.
outData = {}
for slaveConf in config.slaveConfs:
slaveDesc = slaveConf.makeDpSlaveDesc()
# Set User_Prm_Data
dp1PrmMask = bytearray((pyprofibus.dp.DpTelegram_SetPrm_Req.DPV1PRM0_FAILSAFE,
pyprofibus.dp.DpTelegram_SetPrm_Req.DPV1PRM1_REDCFG,
0x00))
dp1PrmSet = bytearray((pyprofibus.dp.DpTelegram_SetPrm_Req.DPV1PRM0_FAILSAFE,
pyprofibus.dp.DpTelegram_SetPrm_Req.DPV1PRM1_REDCFG,
0x00))
slaveDesc.setUserPrmData(slaveConf.gsd.getUserPrmData(dp1PrmMask=dp1PrmMask,
dp1PrmSet=dp1PrmSet))
# Register the ET-200S slave at the DPM
master.addSlave(slaveDesc)
# Set initial output data.
outData[slaveDesc.name] = bytearray((0x00, 0x00))
# Initialize the DPM
master.initialize()
# Cyclically run Data_Exchange.
while True:
# Write the output data.
for slaveDesc in master.getSlaveList():
slaveDesc.setMasterOutData(outData[slaveDesc.name])
# Run slave state machines.
handledSlaveDesc = master.run()
# Get the in-data (receive)
if handledSlaveDesc:
inData = handledSlaveDesc.getMasterInData()
if inData is not None:
# In our example the output data shall be a mirror of the input.
outData[handledSlaveDesc.name][0] = inData[0] & 3
outData[handledSlaveDesc.name][1] = (inData[0] >> 2) & 3
# Feed the system watchdog, if it is available.
if watchdog is not None:
watchdog()
except pyprofibus.ProfibusError as e:
print("Terminating: %s" % str(e))
return 1
finally:
if master:
master.destroy()
return 0
if __name__ == "__main__":
import sys
sys.exit(main())
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