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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
import pyprofibus
from pyprofibus import DpTelegram_SetPrm_Req, monotonic_time
master = None
try:
# Parse the config file.
config = pyprofibus.PbConf.fromFile("example_et200s.conf")
# Create a PHY (layer 1) interface object
phy = config.makePhy()
# Create a DP class 1 master with DP address 1
master = pyprofibus.DPM1(phy = phy,
masterAddr = config.dpMasterAddr,
debug = True)
outData = {}
# Create a slave descriptions.
for slaveConf in config.slaveConfs:
gsd = slaveConf.gsd
# Create a slave description for an ET-200S.
# The ET-200S has got the DP address 8 set via DIP-switches.
slaveDesc = pyprofibus.DpSlaveDesc(identNumber = gsd.getIdentNumber(),
slaveAddr = slaveConf.addr)
# Create Chk_Cfg telegram
slaveDesc.setCfgDataElements(gsd.getCfgDataElements())
# Set User_Prm_Data
dp1PrmMask = bytearray((DpTelegram_SetPrm_Req.DPV1PRM0_FAILSAFE,
DpTelegram_SetPrm_Req.DPV1PRM1_REDCFG,
0x00))
dp1PrmSet = bytearray((DpTelegram_SetPrm_Req.DPV1PRM0_FAILSAFE,
DpTelegram_SetPrm_Req.DPV1PRM1_REDCFG,
0x00))
slaveDesc.setUserPrmData(gsd.getUserPrmData(dp1PrmMask = dp1PrmMask,
dp1PrmSet = dp1PrmSet))
# Set various standard parameters
slaveDesc.setSyncMode(slaveConf.syncMode)
slaveDesc.setFreezeMode(slaveConf.freezeMode)
slaveDesc.setGroupMask(slaveConf.groupMask)
slaveDesc.setWatchdog(slaveConf.watchdogMs)
# Register the ET-200S slave at the DPM
master.addSlave(slaveDesc)
# Set initial output data.
outData[slaveDesc.slaveAddr] = bytearray((0x00, 0x00))
# Initialize the DPM
master.initialize()
# Cyclically run Data_Exchange.
while True:
# Write the output data.
for slaveDesc in master.getSlaveList():
slaveDesc.setOutData(outData[slaveDesc.slaveAddr])
# Run slave state machines.
handledSlaveDesc = master.run()
# Get the in-data (receive)
if handledSlaveDesc:
inData = handledSlaveDesc.getInData()
if inData is not None:
# In our example the output data shall be a mirror of the input.
outData[handledSlaveDesc.slaveAddr][0] = inData[0] & 3
outData[handledSlaveDesc.slaveAddr][1] = (inData[0] >> 2) & 3
except pyprofibus.ProfibusError as e:
print("Terminating: %s" % str(e))
finally:
if master:
master.destroy()
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