Siemens 6AV6355-1CA47-7ES6 OP 177B

€ 3.495,00

SKU: 6AV6355-1CA47-7ES6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7ES6 is an Operator Panel (OP 177B) belonging to the SIMATIC HMI series, designed for machine-level human-machine interface applications. This unit provides a monochrome or color display with keypad-based operation and is part of Siemens' mid-range HMI panel lineup. The OP 177B is engineered for reliable process visualization and operator control in demanding industrial environments.

The 6AV6355-1CA47-7ES6 features a 5.7-inch STN display and supports communication via MPI, PROFIBUS DP, and RS-422/RS-485 interfaces, enabling integration with SIMATIC S7 and S5 PLCs as well as third-party controllers. The panel includes configurable function keys, a numeric/alphanumeric keypad, and supports WinCC flexible as its configuration software. It operates on a 24 V DC supply and is built to meet industrial protection standards for panel mounting.

The OP 177B is widely deployed in manufacturing, process automation, and machine building applications where robust operator interaction is required without the complexity of a full touchscreen panel. It is commonly found on packaging machinery, conveyor systems, and production lines where keypad-driven navigation and clear process visualization are preferred. The panel's compatibility with the broad SIMATIC controller ecosystem makes it a practical choice for both new installations and system upgrades.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Resolution	320 x 240 pixels (QVGA)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 10 W
Communication Interface	MPI, PROFIBUS DP, RS-422/RS-485
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Configuration Software	WinCC flexible 2008
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC or controller. The connection has been interrupted or cannot be established.
Check MPI/PROFIBUS cable connections and termination resistors. Verify the PLC address and baud rate settings match the HMI configuration in WinCC flexible.
Event ID: 10001: Connection to the PLC was established but subsequently lost during operation.
Inspect cable integrity and connector seating. Check for electromagnetic interference sources near the communication cable. Verify PLC is in RUN mode.
Event ID: 40000: Project download error. The configuration project could not be transferred to the panel successfully.
Ensure the correct communication interface and transfer settings are selected in WinCC flexible. Check USB or MPI/PROFIBUS connection between engineering PC and panel.
Event ID: 20000: Tag read/write error. The HMI cannot read from or write to a configured PLC tag or data area.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory area. Confirm the PLC program is running and the addressed area exists.
Event ID: 50000: System memory low. The panel's available runtime memory is insufficient for the loaded project.
Reduce the number of active screens, images, or logged data in the project. Optimize the WinCC flexible project to reduce memory footprint.
Event ID: 60000: Internal device error or hardware fault detected on the panel.
Perform a panel restart. If the error persists, back up the project and perform a factory reset. Contact Siemens technical support or arrange for hardware inspection if the fault recurs.
Event ID: 30000: Alarm buffer overflow. The number of pending alarms has exceeded the configured buffer capacity.
Acknowledge and clear active alarms. Increase the alarm buffer size in the WinCC flexible project configuration if overflow occurs frequently.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6355-1CA47-7ES6)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, S7-400, and S7-1200 PLCs via MPI or PROFIBUS DP. It also supports communication with SIMATIC S5 controllers and selected third-party PLCs via RS-422/RS-485 using appropriate drivers in WinCC flexible.

What configuration software is required for this panel?

The OP 177B is configured using Siemens WinCC flexible 2008 or later compatible versions. Projects are transferred to the panel via MPI, PROFIBUS, or USB connection.

What is the supply voltage for the 6AV6355-1CA47-7ES6?

The panel requires a 24 V DC power supply. Ensure the supply is within the permissible tolerance range as specified in the device manual, typically 19.2 V DC to 28.8 V DC.

What is the front panel protection rating of the OP 177B?

The front panel of the OP 177B is rated IP65, making it suitable for environments where dust and water jets may be present. The rear of the unit is rated IP20.

Can the OP 177B be used as a replacement for older Siemens OP panels?

Yes, the OP 177B is designed as a successor to earlier SIMATIC OP panels such as the OP 17 and OP 27. Existing WinCC flexible projects can often be migrated, though hardware cutout dimensions should be verified before installation.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check that the voltage is within the 19.2–28.8 V DC range. Inspect the internal fuse if accessible.

Correct the supply voltage if out of range. Replace the power supply unit if voltage is absent at the source. If supply is correct and display remains blank, the backlight or internal power board may require replacement.

Panel displays 'No connection to PLC' or communication error at startup

Verify the MPI or PROFIBUS DP cable is securely connected at both the panel and PLC ends. Check bus termination is correctly applied at both ends of the network. Confirm the PLC station address and baud rate in WinCC flexible match the PLC configuration.

Re-seat connectors and replace damaged cables. Correct address and baud rate settings in the WinCC flexible project and re-download. Add or correct bus termination resistors as required.

Touchscreen or keypad inputs are not responding correctly

Check whether the panel is in transfer mode, which disables normal operation. Verify no physical damage to the keypad membrane. For function key issues, check key assignments in the WinCC flexible project.

Exit transfer mode by canceling the transfer dialog. If keypad membrane is damaged, arrange for panel repair or replacement. Correct key assignments in the project and re-download to the panel.

Project download fails or transfer cannot be initiated

Confirm the correct transfer channel (MPI, PROFIBUS, or USB) is selected on both the panel and in WinCC flexible. Check that the panel is in transfer mode before initiating download. Verify cable integrity.

Set the panel to transfer mode via the Start Center menu. Select the matching interface in WinCC flexible transfer settings. Replace the communication cable if transfer still fails after settings are confirmed.

Panel reboots unexpectedly or freezes during operation

Check the 24 V DC supply for voltage dips or instability under load. Inspect the operating environment for excessive temperature or vibration. Review the project for memory overload conditions.

Stabilize the power supply using a dedicated 24 V DC source with adequate current capacity. Ensure ambient temperature is within the 0–50 °C operating range. Optimize the WinCC flexible project to reduce runtime memory usage.

Condition	Repair, Used, Refurbished, New in box (sealed)