Error LED SF and BF1 on PLC S7-300 SIEMENS/ CPU317-2 PN/DP (ET200S Distributed I/O Module)

I/O Access Error, Reading (OB122)

Error LED (SF)

Error LED (BUS1F)

Figure 1.1 - Error LED SF and BF1 (S7-300)

#Hardware - Configuration

(A). Figure 1.1

→Slot 1 = PS 307 10A (Order No. 6ES7 307-1KA00-0AA0), Load supply voltage 120/230 VAC:24VDC/10A

→Slot 2 = CPU 317-2 PN/DP (Order No. 6ES7 317-2EK13-0AB0/V2.6), 1024 KB work memory, 0.05ms/1000 instructions, PROFINET connection, S7 Communication/loadable FBs/FCs, PROFINET IO-Controller, supports RT, PROFINET interface and 1 port, PROFINET CBA, PROFINET CBA-Proxy, TCP/IP transport protocol, combined MPI/DP connection/MPI or DP master or DP slave, multi-tier configuration up to 32 modules, constant DP bus cycle time, routing, firmware V2.6

→X1 = MPI/DP (PROFIBUS)

→X2 = PN-IO (Ethernet), Address: 192.168.0.3

→X2 P1 = Port 1

Figure 1.2 - Distributed I/O Module (Error LED: RED)

(B). Figure 1.2

→Slot 1 = PM-E DC24/48V/ AC24/230V (Order No. 6ES7 138-4CB11-0AB0), Power module PM-E DC24-48V/ AC24-230V, with diagnostics and fuse

→Slot 2 = 1 SI ASCII (32 Byte) / Order No. 6ES7 138-4DF01-0AB0, Communication module with a serial interface (RS232, RS422 or RS485) and ASCII log with 32 byte I/O interface

→Slot 3 = 1 SI Modbus Master (8 B~ / Order No. 6ES7 138-4DF11-0AB0, Communication module with a serial interface (RS232, RS422 or RS485) and Modbus master log with 8 byte I/O interface

→Slot 4 = 2AI U HF (Order No. 6ES7 134-4LB02-0AB0), Analog input module AI 2xU (1V to 5V/15 bits, +/-5V/15 bits+sign, +/-10V/15 bits+sign), High Feature, supports isochrone mode

→Slot 5 = 4DI DC24V ST (Order No. 6ES7 131-4BD00-0AA0), Digital input module DI 4xDC24V, standard; also available as SIPLUS module with order number 6AG1 131-4BD00-2AA0

→Slot 6 = 2AO I HF (Order No. 6ES7 135-4MB02-0AB0), Analog output module AO 2xI (+/-20mA /15 Bit+sign, 4-20mA/15 Bit), High Feature, supports isochrone mode

→Slot 7, Slot 8 = 1 COUNT 24V/100 kHz M (Order No. 6ES7 138-4DA04-0AB0 M/V1.0), Counter module, 24V/100 kHz for measurement of rotational speed, frequency and period measuring, supports clocking

→Slot 9 = 2AI I 2/4WIRE HF (Order No. 6ES7 134-4MB02-0AB0), Analog input module AI 2xI, 2/4-wire transmitter (+/-20 mA /15 bits+sign, 4-20 mA/15 bits), High Feature, supports isochrone mode

→Slot 10, Slot 11 = 2RO NO/NC 24-230V/5A (Order No. 6ES7 132-4HB10-0AB0), Digital output module 2x relay Form C 24 VUC to 230 VUC/5A

→Slot 12 = 1 COUNT 5V/500 kHz M (Order No. 6ES7 138-4DE02-0AB0 M/V1.0), Counter module, 5 V/500 kHz for measurement of rotational speed, frequency and period measuring, supports clocking

→Slot 13, Slot 14, Slot 15 = 2AI I 2/4WIRE HF (Order No. 6ES7 134-4MB02-0AB0), Analog input module AI 2xI, 2/4-wire transmitter (+/-20 mA/15 bits+sign, 4-20 mA/15 bits), High Feature, supports isochrone mode

→Slot 16 = 2AI U HF (Order No. 6ES7 134-4LB02-0AB0), Analog input module AI 2xU (1V to 5V/15 bits, +/-5V/15 bits+sign, +/-10V/15 bits+sign), High Feature, supports isochrone mode

→Slot 17, Slot 18, Slot 19 = 1 COUNT 24V/100 kHz M (Order No. 6ES7 138-4DA04-0AB0 M/V1.0), Counter module, 24 V/100 kHz for measurement of rotational speed, frequency and period measuring, supports clocking

#Module Information

The Module Information functions can each be found in the various tabs within the Module Information dialog box. When displayed in an active situation, only those tabs relevant to the selected module are displayed.

Function/Tab - Information and Use

1). General/ Status

→Identification data on the selected module, for example: order number, release number, status, slot in rack.

→The online information from the inserted module can be compared with the data for the configured module.

→CPU317-2 PN/DP

Figure 1.3 - Error LED SF and BUS1F (Status)

2). Diagnostic Buffer

→Overview of events in the diagnostic buffer and detailed information on the selected event.

→To find the cause of a CPU STOP and evaluate the events on the selected module leading to it.

→Using the diagnostic buffer, errors in the system can still be analyzed at a later time to find the cause of a STOP or to trace back and categorize the occurrence of individual diagnostic events.

→CPU317-2 PN/DP

Figure 1.4 - I/O access error, reading

3). DP Slave Diagnostics

→Diagnostic data for the selected DP slave.

→To evaluate the cause of a fault in a DP slave.

→IM151-1 Standard

Figure 1.5 - Slot 4 faulty/ Module error

#Replacing Individual I/O Module

→Slot 4 faulty/ Module error (2AI U HF/ Order No. 6ES7 134-4LB02-0AB0)

→Replace with the new Module. Verify the replacement hardware is in the hardware catalog of the hardware configuration.

→Check and record the module properties by right-clicking on the slot number of the module

being replaced.

→In the hardware configuration, right-click on the slot number being replaced and select Replace Object.

Figure 1.6 - Replace Object

→In the resulting window (Figure 1.7 below), click on IM151-1 Standard.

Figure 1.7 - IM151-1 Standard

→Locate and select the correct replacement module.

→A warning message window will appear (Figure 1.8 below), asking if you want to exchange the component. Verify the Order No. for the old module and new module are correct. If so, select Yes.

Figure 1.8 - Warning message (Yes)

→Check the module properties by right-clicking on the slot number of the module that was replaced. Select Object Properties from the menu. Verify and/or correct all settings under each tab in the Properties window.

→Save the changes by clicking Station and then selecting Save and Compile from the dropdown menu.

Figure 1.9 - Save and Compile (Station)

→Download the new hardware configuration and I/O software to the PLC system.

Figure 2.1 - Distributed I/O Module (Status: OK)

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