Siemens Simatic S7-300 CP 341 User Manual page 10

Table of contents
3 Commissioning the CP 341 . ................................................................................................................... 109
4 Mounting the CP 341 . ............................................................................................................................. 111
4.1 CP 341 slots............................................................................................................................. 111
4.2 Mounting and Dismounting the CP 341 ................................................................................... 112
4.2.1 Installation steps . ..................................................................................................................... 112
4.2.2 Removal steps ......................................................................................................................... 113
4.2.3 Installation guidelines. .............................................................................................................. 113
5 Configuring and Parameter Assignment the CP 341 . ............................................................................ 115
5.1 Parameter Assignment Options . .............................................................................................. 115
5.2 Installing the Programming Interface . ...................................................................................... 116
5.3 Configuring the CP 341. ........................................................................................................... 117
5.4 Assigning Parameters to the Communications Protocols. ....................................................... 118
5.5 Identification data . .................................................................................................................... 119
5.6 Managing the Parameter Data . ................................................................................................ 121
5.7 Subsequent Loading of Drivers (Transmission Protocols). ...................................................... 122
5.8 Firmware updates . ................................................................................................................... 123
5.8.1 Subsequent Loading of Firmware Updates.............................................................................. 123
5.8.2 Viewing the Firmware Version . ................................................................................................ 126
6 Communication via Function Blocks . ...................................................................................................... 127
6.1 Overview of the Function Blocks. ............................................................................................. 128
6.2 Using function blocks . .............................................................................................................. 130
6.3 Using the Function Blocks with the 3964(R) Procedure . ......................................................... 131
6.3.1 S7 Sends Data to a Communication Partner . .......................................................................... 132
6.3.2 S7 receives data from a communication partner . .................................................................... 136
6.4 Using the Function Blocks with the RK 512 Computer Connection. ........................................ 140
6.4.1 Sending Data with FB P_SND_RK (Active Request). .............................................................. 142
6.4.2 Receiving Data with FB P_RCV_RK (Passive Request) . ........................................................ 147
6.4.3 Readying Data with FB P_RCV_RK (Passive Request) . ......................................................... 151
6.4.4 Fetching Data with P_SND_RK FB (Active Request) . ............................................................. 155
6.5 Using the System Function Blocks with the ASCII Driver. ....................................................... 160
6.5.1 Function blocks with ASCII driver . ........................................................................................... 160
6.5.2 Interface status of the CP 341, checking . ................................................................................ 161
6.5.3 Interface outputs of the CP 341, setting/resetting. ................................................................... 163
6.6 Use of function blocks to output message texts to a printer . ................................................... 165
6.7 Parameter assignment of the Function Blocks . ....................................................................... 170
6.7.1 General Information on Data Block Assignment. ..................................................................... 170
6.7.2 Supplying the block parameters. .............................................................................................. 172
6.8 General Information on Program Processing. .......................................................................... 177
6.9 Technical Specifications of the Function Blocks . ..................................................................... 178
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CP 341 Point-to-Point Communication, Installation and Parameter Assignment
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Manual, 09/2008, A5E02191071-01