Siemens Simatic S7-1500 / ET 200MP - Page 84

System overview
4.7 Communication
Automation system
System Manual, 01/2023, A5E03461182-AK
83
Communication modules for point-to-point connection
Short designation CM PtP RS232 HF
CM PtP RS232 BA
CM PtP RS422/485 HF
CM PtP RS422/485 BA
Article number
High Feature (HF)
6ES7541-1AD00-0AB0
6ES7541-1AB00-0AB0
Basic (BA)
6ES7540-1AD00-0AA0
6ES7540-1AB00-0AA0
Equipment Manual
High Feature (HF)
Link
Link
Basic (BA)
Link
Link
Interface
RS232
RS422/485
Data transmission rate
High Feature (HF)
300 to 115 200 bps
300 to 115 200 bps
Basic (BA)
300 to 19 200 bps
300 to 19 200 bps
Frame length, max.
High Feature (HF)
4 KB
4 KB
Basic (BA)
1 KB
1 KB
Diagnostic interrupt
X
X
Hardware interrupt
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---
Isochronous mode
---
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Protocols
High Feature (HF)
Freeport, 3964 (R),
Modbus RTU master,
Modbus RTU device
Freeport, 3964 (R),
Modbus RTU master,
Modbus RTU device
Basic (BA)
Freeport, 3964 (R)
Freeport, 3964 (R)
Benefits
The communication modules point-to-point connection S7-1500 provide you with the
following advantages:
• Connection of legacy and external systems possible
• Connection of data readers or special sensors
• Can be used centrally in SIMATIC S7-1500 and in ET 200MP distributed I/O system
• Variety of physical interfaces, e.g. RS232 and RS422 or RS485
• Predefined protocols, e.g. 3964(R), Modbus RTU or USS
• Application-specific protocols based on Freeport (ASCII)
• Uniform programming interface for all modules
• Diagnostic interrupt for simple fault rectification