Parameterization software

Loadable drivers for CP 441-2 and CP 341

Type of license

Simple license, copy license

Target system

SIMATIC CP 341, SIMATIC CP 441-2

Technical specifications

Modbus Master

• Modbus protocol with RTU format

• Master/slave coupling: SIMATIC S7 is master

• Function codes implemented: 01, 02, 03, 04, 05, 06, 07, 08, 11,12,15,16

• No V.24 control and signal lines

• CRC polynomial: x¹⁶ + x¹⁵ + x² +1

• Interfaces: TTY (20 mA); V.24 (RS 232 C); X.27 (RS 422/485) 2-wire or 4-wire

• Receive mailbox specified on BRCV

• Character delay time 3.5 characters or multiple thereof

• Broadcast message possible

Adjustable parameters

• Transmission rate 300 bit/s up to 76800 bit/s (TTY up to 19200 bit/s)

• Character frame

• With/without RS 485 operation for 2-wire connections

• With/without modem operation (ignore smudge characters)

• Response monitoring time 100 ms to 25.5 s in steps of 100 ms

• Factor for the character delay time 1-10

• Default setting of receive line when using the X.27 interface module

Modbus slave

• Modbus protocol with RTU format

• Master/slave coupling: SIMATIC S7 is slave

• Function codes implemented: 01, 02, 03, 04, 05, 06, 08, 15, 16

• No V.24 control and signal line

• CRC polynomial: x¹⁶ + x¹⁵ + x² +1

• Interfaces: TTY (20 mA), V.24 (RS 232C), X.27 (RS 422/485) 2-wire or 4-wire

• Communications FB 180, instance DB 180 (use of a multi-instance)

• Conversion of the Modbus data address to S7 data areas. Data areas which can be processed: DB, bit memories, outputs, inputs, timers, counters

• Character delay time 3.5 characters or multiple thereof

Adjustable parameters

• Transmission rate 300 bit/s up to 76800 bit/s (TTY up to 19200 bit/s)

• Character frame

• Slave address of CP (1 to 255)

• With/without RS 485 operation for 2-wire connection

• With/without modem operation (ignore smudge characters)

• Factor for the character delay time 1-10

• Number of work DB (for FB processing)

• Enabling of memory areas for writing by the master

• Default setting of receive line when using the X.27 interface module

• Conversion of Modbus addresses to S7 data areas