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2500 Series® Janus Processors (active)

• CTI Networked Products and LOGJ4 Vulnerability
• ​Janus Processor Support of CTI 2500 and Simatic/TI500/TI505 Components
• CTI Processor Batteries
• Janus Processor Battery - Possible Dimensional Problem
• Online Change in Janus Processors when using Locked Variables (August 25,2022)
• Online Change when using certain Function Blocks in Janus Processors and Coprocessors (March 8, 2023, updated: October 24, 2023)
• Possible Scan Extension with Heavy Loading on CAMP Server (issued: March 8, 2023, updated: August 16, 2023)
• Locking of Structure Variables (March 21, 2023)
• Problems with OPC-UA Server in Janus Processors and Coprocessors (April 28, 2023)
• Reporting of Battery Errors (May 1, 2023)
• Missing Resistor in Ethernet Power Monitor Circuit (July 11, 2023)
• Loss-of-Communications-with-CAMP-Server-after-power-loss-and-restart (August 22, 2023)
• Not Properly Handling Default Gateway (August 31, 2023)

2500 Series® Janus Coprocessor 2500-JACP (active)

• Problems with OPC-UA Server in Janus Processors and Coprocessors (April 28, 2023)
• Block Transfer Driver Sometimes Misses Updates (June 26, 2024)

Janus Workbench Integrated Development Environment

• Errant popup windows may make it appear that Workbench is "locked up"

2500 Series® Processors (active)

• CTI Networked Products and LOGJ4 Vulnerability
• 505-CP1434TF “SINEC H1” Module incompatibilities with CTI 2500 Series Processors
• Profibus Stops Communicating (April 4, 2018)
• Installing CTI 2500 Series® USB Driver on 64 bit versions of Microsoft Windows 8/8.1 and Windows 10 (February 17, 2015)
• CTI 2500 Series® Processors - When using V8.04 or V9.02 firmware, an on-line edit of PID Loop Parameters using "PID Loop Edit" screen may cause the PID Loop control to become unstable (March 31, 2015)
• TISOFT running in DOS window under Windows-XP stops working (July 27,2012) - NOTE: may also affect APT users
• CTI 2500 Series® Processors - What Revision is My 2500 Series® Processor? (February 15, 2010)
• CTI 2500 Series® Processors - Program download and startup using CTI 2500 Series® and Simatic® 545 / 555 Processors (October 20, 2009)
• CTI 2500 Series® Processors - Firmware and CPLD Versions in CTI Processors (September 25, 2009)
• CTI 2500 Series® Processors - Unconfigured Remote Bases and Scan Time  (September 16, 2009)
• CTI 2500 Series® Processors - Support of Special Function Modules (November 4, 2010)
• CTI Processor Batteries

2500 Series® Processors (resolved)

• CPU Displays "E89" on Powerup (resolved with Firmware V9.16)
• CTI 2500 Series® Processors - V8.02 firmware sometimes causes a fatal compile error with FE300 on the front panel when going from PROGRAM to RUN mode (October 21, 2015) 
• CTI 2500 Series® Processors - User program is not preserved though a power-down (April 7, 2014)
• 2500P- ECC1 Module is Unable to Reconnect to the Processor after the IP Address of Processor is Changed (January 10, 2013)
• CTI 2500  Series® Processors - Possible loss of Ethernet Communications after updating 2500 Series® Processor to V7.05 (January 4, 2012)
• CTI 2500  Series® Processors - Installing USB driver on 64-bit Windows 8 Systems (December 7, 2012)
• CTI 2500 Series® Processors - Problems with PRINT statement in SF Programs after upgrading to V6.11 Firmware (November 12, 2010)
• CTI 2500 Series® Processors - Timeouts, Stalls, Lockups on HMI and programming Software with V6.03 / V6.05 Firmware and Multiple CPUs Connected Using an Ethernet Hub (March 8, 2010)
• CTI 2500 Series® Processors - Web Server doesn't respond, sometimes accompanied by FE103 (December 16, 2009)
• CTI 2500 Series® Processors - Problem with RLL COMPARE in JUMP zone of control (October 14, 2009)
• CTI 2500 Series® Processors - Remote I/O Communications Problems using V6.00 and V6.02 Firmware with Series 500 I/O Bases in Certain Configurations (September 23, 2009)
• CTI 2500 Series® Processors - Ethernet port stops responding, possibly with FE113 or FE103 error (September 16, 2009)
• CTI 2500 Series® Processors - Siemens RBCs go to status 1 with firmware V6.00 (September 9, 2009)
• CTI 2500 Series® Processors  - Powering down all devices on a Profibus network causes a fatal error (September 3, 2008)
• CTI 2500 Series® Processors  - Connecting a serial cable with loose ground wire caused FE103 fatal error (September 3, 2008)
• CTI 2500 Series® Processors  - One-Shot Contact triggers when transitioning from Run to Edit Mode (September 3, 2008)
• CTI 2500 Series® Processors  - B-memory parameters not allowed in a Compare instruction box  (September 3, 2008)
• CTI 2500 Series® Processors  - MCR instruction does not work correctly in some cases where the program contains more than one MCR statement (September 3, 2008)
• CTI 2500 Series® Processors  - Loop reset time could be set to 0 via HMI or a data window (September 3, 2008)
• CTI 2500 Series® Processors  - Discrete I/O forces and retentive control relays not preserved through power-down (August 18, 2008)
• CTI 2500 Series® Processors  - I/O Errors and base logoffs (August 13, 2008)
• CTI 2500 Series® Processors  - Problems with S-memory operation (loops, alarms, SFPGM, SFSUBs) after reloading from FLASH (August 13, 2008)
• CTI 2500 Series® Processors  - I/O Errors and base logoffs with Series 500 Coaxial I/O (August 13, 2008)
• CTI 2500 Series® Processors  - Problem upgrading some CTI 2500 Series™ Processors to Firmware Version 3.08  (May 28, 2008)
• CTI 2500 Series® Processors  - Fatal Error 113 (May 28, 2008)
• CTI 2500 Series® Processors  - Problem with some Siemens® Special Function Modules - Firmware Version 3.05 only (April 28, 2008)
• CTI 2500 Series® Processors - RS-485 Remote I/O Network Communications Reliability (March 20, 2008)
• CTI 2500 Series® Processors - Using 505-5190 6MT I/O Adapter (March 6, 2008)
• CTI 2500 Series® Processors - Adjusting Time Slice on PLC Scan with Firmware V3.0 (January 31, 2008)
• CTI 2500 Series® Processors - Connecting to the Processor from an RBC Serial Port (December 4, 2007)
• CTI 2500 Series® Processors - Changing the IP Address for the Ethernet Port (September 13, 2007)
• CTI 2500 Series® Processors - Compatibility (August 30, 2007)
• CTI 2500 Series® Processors - Replacing a Siemens® Processor Which Operates an RS-485 Remote I/O Network (August 7, 2007)

2500C-2572-B Compact Fast Ethernet Adapter

• CTI Networked Products and LOGJ4 Vulnerability
• 2572-B Loses IP Address / MAC Address / Serial Number
• Using 2500C-2572-B Compact Fast Ethernet Adapter in Rev 000 Bases (September 21, 2017) 062-00469-010

2500P-ACP1 Application Coprocessor

• CTI Networked Products and LOGJ4 Vulnerability
• An internal timer problem causes the 2500P-ACP1 module to stop all time-based operations (March 13, 2015) - resolved firmware 2.06

2500P-JACP Application Coprocessor

• Possible Scan Extension with Heavy Loading on CAMP Server (March 8, 2023)

2500P-ECC1 Ethernet Communications Coprocessor

• CTI Networked Products and LOGJ4 Vulnerability
• Problem with 2500P-ECC1 and Multicast (resolved firmware 2.05)
• Certain Tagname Database configurations cause module to supply 0 values for tagname data (resolved firmware 2.05)
• PLC data associated with the Modbus client is cleared (changed to 0) the the 2500P-ECC1 is reset (resolved firmware 2.11)
• An internal timer problem causes the 2500P-ECC1 module to stop initiating client requests (March 12, 2015) (resolved firmware 2.17)

Compact I/O

• Compact Digital Input Modules 

Profibus Remote Base Controllers (2500-RBC, 2500C-RBC-PRF, 2500C-RADP-RBC)

• Problem with 2500-RBC and some Siemens® S7 PLCs (January 29, 2007)
• Profibus RBCs and Certain High Speed Counter modules (February 15, 2023)
• Profibus RBCs and Siemens TIA Portal (February 15, 2023)

2500-RIO / 2500-RIO-A RS-485 Remote Base Controller

• Problem with 2500-RIO-A with firmware V7.01-V7.03 and used with Siemens/TI 505-7003 High Speed Counter Module (January 4, 2013)
• Problem with 2500-RIO-A when used in redundancy mode in 2500-R11-A or 505-6511 I/O base  (October 3, 2011)
• Problem with 2500-RIO and low density mixed word and discrete module - example 500-5023 High Speed Pulse Input Module (April 23, 2008)
• Problem with 2500-RIO and sixteen 8-Pt Analog Output Modules (April 10, 2007)
• Problem with 2500-RIO and 560/565 Systems (January 24, 2007)
• Problem with 2500-RIO and Siemens® 505-6208, 505-6208-A, 505-6208-B Analog Output Modules (January 24, 2007)
• Problem with 2500-RIO and Multiple 16-Point Analog Input Modules (June 20, 2006)

​2557-A 16-Channel RTD Input Module

• Inputs periodically drop out when digital filtering is enabled (March 8, 2023)
• 2557-A Calibration Mode on Power-Up (July 17, 2024)

2559-RTD 8-Channel RTD Input Module

• 2559-RTD 8ch RTD Input Module - Erratic temperature readings (May 13, 2009)

2559-TC 8-Channel Thermocouple Input Module

• 2559-TC Erroneous temperature values with digital filtering OFF (September 23, 2009)
• 2559-TC Incompatibility with 505-7028 in certain applications (February 1, 2006)

2562 8-Channel Analog Output Module

• Outputs go to full scale when 24V power applied with the PLC System powered down (March 23, 2021)

2572 / 2572-A Ethernet TCP/IP Adapter

• CTI Networked Products and LOGJ4 Vulnerability
• Corrupted RAM can cause the 2572-A to "hang" and constantly reset
• 2572 V6.5 Interaction with 7012 Module (October 28, 1998)
• Problem with certain versions of 2572-A Firmware with SFIC Version Number 2.3 and below (November 15, 2006)

2572-B Fast Ethernet Adapter

• Incorrectly Loaded Firmware on Units with Serial Numbers 346051 - 346075
• CTI Networked Products and LOGJ4 Vulnerability
• 2572-B Loses IP Address / MAC Address / Serial Number
• 2572-B Multicast will not work properly if the default gateway IP address is invalid

2573-MOD / 2573-TCM2 Serial Interface Adapter

• An Invalid Connection Number on 2573-MOD does not Return an Error (October 20, 2009)
• Serial Ports on 2573-MOD/TCM2 may not function when RS422 is used (October 10, 1996)
• Problem with 2573-TCM2 and RS485 serial connection (March 6, 2008)

2577 Profibus-DP Slave Adapter

• Using 2577 Profibus Slave Adapter with 2500 Series® Processors (March 6,2008)
• Configuring the CTI 2577 Profibus Adapter with some versions of COM Profibus and Step 7

2500S Slice I/O

• Slice I/O and Siemens/TI CPUs (December 11, 2014)

5250-TI5 Timer Counter Access Module

• 5250-TI5 - Cannot read Timers / Counters / Drums when connected to 2500 Series® CPU (February 3, 2010)

Other Products

• Operating TI 500-5009 and 500-5016 Analog Modules with CTI equipment
• Using 2500-IADP with 2572 Ethernet Adapter (November 22, 2006)
• Possible Incorrect K-Thermocouple Calibration on 2551-A (October 19, 2007)
• Incompatibility of Certain Analog I/O Modules with 505-6870 (May 21, 1999)