Reliable Serial Connectivity for Siemens Simatic/TI 505 PLCs via NITP and Transparent Byte Protocols
This driver is only available as part of the following TOP Server driver suites:
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The Simatic/TI 505 Serial driver works with TOP Server® to exchange data between OPC UA, OPC DA, AVEVA SuiteLink, and DDE clients and Simatic/TI 505 devices using NITP or Transparent Byte over serial - optionally via an Ethernet gateway/terminal server - with extensive error handling.
The driver supports NITP (ASCII) and Transparent Byte (binary) protocols; the selected protocol determines COM settings (parity/data bits) and is chosen during device configuration. Transparent Byte is typically faster when supported by the processor.
Extensive memory type support, flexible addressing, and broad model coverage make this driver ideal for legacy TI 505 installations. Both NITP and Transparent Byte are point-to-point protocols (one processor connected at a time per serial port).
Need Ethernet connectivity instead? For high-speed Ethernet TCP/IP via CTI2572 or CP1434-TCP cards, use the Simatic/TI 505 Ethernet Driver.
This driver is available in the TOP Server Simatic/TI 505 Suite (both Ethernet and Serial drivers included) and the broader TOP Server Manufacturing Suite (140+ industrial connectivity drivers).
Proven benefits for reliable serial connectivity to legacy Simatic/TI 505 controllers
Single driver handles both NITP (ASCII) and Transparent Byte (binary) protocols - Transparent Byte is typically faster when supported
Supports 15 memory types (X, Y, WX, WY, C, V, K, STW, TCP, TCC, DSP, DSC, DCC, DTB, DCP) for complete TI 505 data area access
Supports both 0-based and 1-based bit addressing plus configurable HiLo/LoHi bit order for V, K, and STW address types
RS-232, RS-422, RS-485 direct connections plus Ethernet encapsulation via converters, device servers, and terminal servers
"We use this driver against a mix of TI-545 and TI-565 controllers via the Transparent Byte protocol and the data rates are noticeably better than NITP. The extensive memory type coverage (especially DSP and DSC) was essential for our flow computer integration - nothing else covered those address types."
Martin Hughes
Senior Controls Engineer, Process Industries
Everything you need for reliable Simatic/TI 505 serial connectivity
Capacity: up to 100 channels, up to 31 devices per channel, with COM IDs 1-999. Practical limits vary by system resources.
Supported memory types: X, Y, WX, WY, C, V, K, STW, TCP, TCC, DSP, DSC, DCC, DTB, and DCP - comprehensive TI 505 data area coverage.
Supports both NITP (ASCII) and Transparent Byte (binary) protocols. Transparent Byte is typically faster when supported by the processor.
Supports 0-based or 1-based bit addressing and configurable HiLo/LoHi bit order for V, K, and STW address types.
All driver data types supported across the full memory map for complete flexibility.
Supports Ethernet Encapsulation for serial-over-Ethernet using Ethernet-to-Serial converters, device servers, or terminal servers.
Modem support with automatic dial configuration and multiple phone number management for remote TI 505 sites.
Adjustable RTS flow timing for radio modem communications and specialized serial configurations.
NITP Protocol
Non-Intelligent Terminal Protocol (ASCII)
TB Protocol
Transparent Byte Protocol (binary - typically faster)
Serial Networks
RS-232, RS-422, RS-485
Ethernet Encapsulation
Via Ethernet/Serial converters, device servers, terminal servers
Max Channels
100
Devices per Channel
31
COM ID Range
1-999
Connection Type
Point-to-point (one processor per serial port)
Memory Types
X, Y, WX, WY, C, V, K, STW, TCP, TCC, DSP, DSC, DCC, DTB, DCP
Bit Addressing
0-based or 1-based; HiLo/LoHi bit order configurable
Client Interfaces
OPC UA, OPC DA, AVEVA SuiteLink, DDE
License Type
Perpetual (licensed per PC)
Note: Compatible with the full range of Siemens Simatic/TI 505 controllers (formerly Texas Instruments TI 505 series), plus CTI 2500 Series processors. Both NITP and Transparent Byte protocols are point-to-point - one processor connected at a time per serial port.
Everything you need to get started, configure, and troubleshoot your driver
Watch step-by-step video tutorials covering installation and configuration
View →Access detailed application notes and guides for TOP Server
View →Comprehensive guide for getting started with TOP Server V6
View →Troubleshooting tips and solutions for TOP Server
View →Complete driver documentation for Serial connectivity (Version 1.033) including NITP/TB protocol details and memory type reference
Download →Companion Ethernet driver for TI 505 via CAMP/CAMP+Packed Task Code protocol using CTI2572 or CP1434-TCP cards
View →View the complete TOP Server release history and version information
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