GE 90-30 PLC - page 34

Chapter

3-1

GFK-1084B

Programming Communications Requests

This chapter describes how to program PLC to PLC communications over the Ethernet

Network. Details of the COMMREQ function and the Channel commands are pres-

ented here. The chapter is divided into 5 sections:

Section 1: The Communications Request

Section 2: The COMMREQ Function Block and Command Block

Section 3: Channel Commands

Section 4: Status Data

Section 5: Controlling Communications in the Ladder Program

Note

This chapter applies only to PLCs being used as client PLCs to initiate

communications. No programming is required for server operation.

Contents

Main Warnings, Cautions, and Notes as Used in this Publication Warning Preface Content of This Manual Related Publications We Welcome Your Comments and Suggestions Page *!&% +%*!&%#&" %&$$% #&" . *!&% %%# &$$%) . *!&% **+) * . *!&% &%*(&##!% &$$+%!*!&%) !% * ( (&($ . '*( (&+#) &&*!% . $ ! % $ " ! % Page Contents Introduction The Ethernet Interface Figure 1-1. Ethernet Communications System Capabilities of the Ethernet Interface Attachment of the Ethernet Interface to the LAN 10Base5 Coax: 10Base2 Coax: 10BaseT: 10BaseF: * Figure 1-2. The Main Tasks for Installing the Ethernet Interface How to Make the System Work * Quick Guide to the Manual Installing the Ethernet Interface Ethernet Interface Hardware Overview Figure 2-1. Ethernet Interface Board Indicators Restart Button LED Test: Restart: Restart and Enter Software Load State: Notes Restart and Enter Maintenance State: Serial Ports The Station Manager Port The Software Loader Port Page Procedure 1: Installing the Ethernet Interface in the PLC Equipment Required to Perform the Installation Procedures Ethernet Interface Installation Warning Page Procedure 2a: Configuring the Ethernet Interface with Logicmaster 90-30 Configuration Software Page Page Page Page l-l Procedure 2b: Configuring the Ethernet Interface using COMPLICITY Control Note network Converter: AAUI Transceiver: Data Rate: Parity: Stop Bits: Flow Control: Page Procedure 3: Verifying Proper Power-Up of the Ethernet Interface Powering-up the Ethernet Interface Problems During Power-up 2-18 TCP/IP Ethernet Communications Users Manual - August 1997 GFK-1084B Hardware Failure Figure 2-2. States of the Ethernet Interface / Operational Maintenance IP Address B C D E F Procedure 4: Pinging TCP/IP Ethernet Interfaces on the Network Pinging the Interface from a UNIX host or a PC Running TCP/IP Software Determining If an IP Address Has Already Been Used Page Section 1: The Communications Request Structure of the Communications Request Figure 3-1. Elements of the Communications R equest COMMREQ Function Block COMMREQ Command Block Channel Commands Advantages of Channel Commands Status Data LAN Interface Status Bits (LIS Bits): Channel Status Bits: COMMREQ Status Word (CRS Word): Detailed Channel Status Words (DCS Words): Operation of the Communications Request Domain of a channel Domain of a TCP connection Domain of a remote server Section 2: The COMMREQ Function Block and Command Block The COMMREQ Function Block Enable: Control logic for activating the COMMREQ Function Block. See Section 5 and IN: SYSID: The COMMREQ Command Block (Word 1) Data Block Length: (Word 2) WAIT/NOWAIT Flag: COMMREQ Status Word: (Word 3) COMMREQ Status Word Pointer Memory Type: (Word 4) COMMREQ Status Word Pointer Offset: This word contains the offset within Section 3: Channel Commands Establishing a Channel Aborting and Re-tasking a Channel Page Establish Read Channel (2003) Example 1 Command BlockBasic Example (Word 7) Channel Command Number: (Word 8) Channel Number: Word 8 specifies the channel to be used for the read. This value (Word 9) Number of Read Repetitions: (Word 10) Time Unit for Read Period: Table 3-1. Time Unit Values for Read/Write Repetition Period (Word 11) Number of Time Units for Read Period: Table 3-2. Series 90 PLC Memory Types (Word 14) Local PLC - Memory Starting Address: W ord 14 specifies the starting address in (Word 15) Remote PLC - Memory Type: (Word 16) Remote PLC - Memory Starting Address: Word 16 specifies starting address in (Word 17) Remote PLC - Number of Memory Units: Word 17 specifies the number of (Word 18) R emote PLC - Network Address Type: (Word 19) R emote PLC - Network Address Length: (Words 20 - 23) Remote PLC - IP Address: Words 20-23 specify the four integers, one (Words 24 - 27) Remote PLC - Program Name: Example 2 Command BlockExample using a Network Address Name (Word 18) Network Address Type: Word 18 specifies the format of the remote PLC (Words 52 - 55) Remote PLC - Program Name: (Word 56 - 59) Remote PLC - Program Block Name: Page Establish Write Channel (2004) Example 1 Command BlockBasic Example (Word 7) Channel Command Number: (Word 8) Channel Number: Word 8 specifies the channel to be used for the write. This (Word 9) Number of Write Repetitions: (Word 10) Time Units for Write Period: (Word 11) Number of Time Units for Write Period: (Word 12) Timeout for Each Write: (Word 14) Local PLC - Memory Starting Address: Word 14 specifies the starting address (Word 15) Remote PLC - Memory Type: (Word 16) Remote PLC - Memory Starting Address: Word 16 specifies starting address in (Word 17) Remote PLC - Number of Memory Units: Word 17 specifies the number of (Word 18) R emote PLC - Network Address Type: Example 2 Command BlockExample using a Network Address name (Word 18) Network Address Type: Word 18 specifies the format of the remote PLC (Words 52 - 55) Remote PLC - Program Name: (Word 56 - 59) Remote PLC - Program Block Name: Page Send Information Report (2010) Example1 Command BlockBasic Example (Word 7) Channel Command Number: (Word 8) Channel Number: Word 8 specifies the channel to be used for the send. This (Word 9) Number of Send Repetitions: (Word 10) Time Unit for Send Period: (Word 11) Number of Time Units for Send Period: (Word 12) Timeout for Each Send: Page Example 2 Command BlockExample using a Network Address name (Word 18) Network Address Type: W ord 18 specifies the format of the remote PLC Abort Channel (2001) Example Command Block (Word 7) Channel Command Number: (Word 8) Channel Number: The channel number specifies the channel to be Retrieve Detailed Channel Status (2002) Example Command Block (Word 7) Channel Command Number: (Word 8) Channel Number: The channel number in Word 8 specifies the channel whose (Word 9) Local PLC - Memory Type: (Word 10) Local PLC - Memory Starting Address: Starting address to store the Detailed Section 4: Status Data Types of Status Data Description of the Status Data OK Output of the COMMREQ Function Block FT Output of the COMMREQ Function Block Status Bits Table 3-3. Status Bits (LIS Bits and Channel Status Bits) (Status Bit 7) Serial Port #2 Fuse Blown: (Status Bit 8) AAUI Fuse Blown: This bit is set to 1 when the AAUI Fuse is blown. Other- (Status Bit 9) Any Channel Error: (Status Bit 13) LAN OK: This input will be held at the value 1 as long as the Ethernet Each channel has a dedicated pair of bits as follows: (Status Bits 17, 19, 21 ... 47) Data Transfer Bit: This bit is normally set to 0. It is pulsed (Status Bits 18, 20, 22 ... 48) Channel Error Bit: This bit is set to 1 when an error is de- Communications Status Words Figure 3-3. Format of the COMMREQ Status Word (CRS Word) Figure 3-4. Format of the Detailed Channel Status Words (DCS Words) Table 3-4. Major Error Codes Minor Error Codes Error Status Service Request Error Description Table 4-5. Minor Error Codes for Major Error Codes 5H and 85H (Continued) Error Status Service Request Error Description Table 3-6. Minor Error Codes for Major Error Code 11H (at Remote Ser ver PLC) Error Status SRTP Error Description Table 3-7. Minor Error Codes for Major Error Code 90H (at Client PLC) Error Status Application Interface Error Description Section 5: Controlling Communications in the Ladder Program Essential Elements of the Ladder Program 3-42 TCP/IP Ethernet Communications Users Manual - August 1997 GFK-1084B Page Troubleshooting Your Ladder Program FT Output is ON COMMREQ Status Word is Zero (0) and FT Output is OFF COMMREQ Status Word is Not One (1) Monitoring the Communications Channel Monitoring the COMMREQ Status Word Monitoring the Channel Error Bit Monitoring the Data Transfer Bit Sequencing Communications Requests Data Transfers with One Repetition Troubleshooting Diagnostic Tools Available for Troubleshooting What to do if you Cannot Solve the Problem PLC Fault Table Table 4-1. PLC Fault Table Descriptions PLC Fault User Action Table 4-1. PLC Fault Table Descriptions (Continued) PLC Fault User Action A Glossary Commonly Used Acronyms and Abbreviations This is a listing of acronyms, and their derivation, that are commonly used throughout this manual. Glossary of Terms Page Page Page Page Page Page B Communications Ports Characteristics What this Appendix Contains Station Manager Port Station Manager Port Settings Station Manager Port Pinouts Station Manager Port Cable Software Loader Port (Serial Port 2) Software Loader Port Pinouts Table B-3. Software Loader Port Pinout Part Numbers for GE Fanuc Cables and Converters Table B-4. Cables for Connecting the Software Loader Port to the RS-232 Port on Your PC Figure B-2. Software Loader Cable Assembly (IC690ACC901) Software Loader Port Cable The AAUI Port for the Ethernet Interface Ethernet AAUI Port Pinouts Table B-5. Pinouts of the AAUI Port Transceiver Configurations B-8 TCP/IP Ethernet Communications Users Manual - August 1997 GFK-1084B Figure B-4. 10Base2 Transceiver Configuration with Built-in Transceiver Cable Figure B-5. 10Base2 Transceiver Configuration using BNC T Connector GFK-1084B B-9 Appendix B Communications Ports Characteristics TRANSCEIVER CABLE TO ETHERNET INTERFACE Figure B-6. 10BaseT Transceiver Configuration Figure B-7. AAUI to AUI Adapter. Can be used to connect to 10Base5 (shown above) or 10BaseF Page C Advanced Information About IP and MAC Addresses IP Addresses Figure C-1. IP Address Format for Network Classes A, B, C Gateways BC G Figure C-2. Connecting Two Networks with a Gateway Subnets C E B G MAC Addresses Appendix Sample Ladder Programs D2 TCP/IPEthernet Communications User 's Manual August 1997 GFK1084B GFK1084B D3 D4 TCP/IPEthernet Communications User 's Manual August 1997 GFK1084B GFK1084B D5 D6 TCP/IPEthernet Communications User 's Manual August 1997 GFK1084B GFK1084B D7 D8 TCP/IPEthernet Communications User 's Manual August 1997 GFK1084B D10 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B D12 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B GFK1084B D13 D14 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B GFK1084B D15 D16 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B Page D18 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B D20 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B GFK1084B D21 D22 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B GFK1084B D23 D24 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B GFK1084B D25 D26 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B GFK1084B D27 D28 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B GFK1084B D29 D30 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B GFK1084B D31 D32 TCP/IPEthernet Communications User's Manual August 1997 GFK1084B Page E PC Software Loader Figure E-1. Software Loader Cable Assembly (IC690ACC901) To install the new firmware, perform the following steps. E F Naming Architecture Name Assignment F Name Resolution Local Table Name Resolution DDP Name Resolution DNS Name Resolution Name Usage F A B C D Index F G H I Index Q R S T