User manual OMRON EJ1

[. . . ] H142-E1-03 EJ1 Modular Temperature Controllers USER´S MANUAL EJ1 Modular Temperature Controllers User's Manual Revised July 2008 iv Preface This manual describes the EJ1 Modular Temperature Controllers, including information on functions, performances, and application methods. Observe the following precautions when using an EJ1 Modular Temperature Controller. · Do not allow the Temperature Controller to be handled by anyone except a specialist with sufficient knowledge of electrical systems. · Read this manual thoroughly and be sure you understand it before attempting to use the Temperature Controller and use the Temperature Controller correctly according to the information provided. [. . . ] If the Setting Change Request Bits are set before the set value is changed, an unexpected value will be written. (2) All programless download parameters will be updated when the Setting Change Request Bits are set. If set values are not the same in EJ1 and PLC memory, e. g. , when the power is turned ON or the bank is changed, always change the values in PLC memory first and then set the Setting Change Request Bits. 143 Programless Communications Set Values Section 5-1 · If the set value contains a decimal point, omit the decimal point and set the value. Example: 100. 0 1000 or 03E8H: set value · When changing set values, always set a new value within the setting range. The set value will not be changed if a value outside the range is set. Operation Commands When the EJ1 confirms that the Operation Command Request Bits have been set by the PLC, the EJ1 reads the operation command code set in PLC memory and accepts the operation command. To execute an operation command, set the operation command code in the PLC memory words corresponding to the Programless Download Settings and then set the Operation Command Request Bits. Note Refer to 5-1-5 Operation Command Codes for Programless Communications for information on operation command codes. · Single Operation Command Operation commands are accepted only once. 4. The EJ1 sets the Operation Command Response Bits. PLC Upload Area Address m+0 m+1 m+2 m+3 m+4 Memory Read Response Bits Setting Change Response Bits 0001 Communications Status EJ1 Download Area Address n+0 n+1 n+2 n+3 n+4 ··· Memory Read Request Bits Setting Change Request Bits 0001 zzzz HFU TC4/2 2. The Operation Command Request Bits are set by the PLC. zzzz zzzz Monitor value Set value 1. The Operation Command Code is changed by the PLC. 3. The EJ1 reads the operation command code. PLC Upload Area Address m+0 m+1 m+2 m+3 m+4 Memory Read Response Bits Setting Change Response Bits 0000 Communications Status Download Area Address n+0 n+1 n+2 n+3 n+4 Memory Read Request Bits Setting Change Request Bits 0000 zzzz 5. The Operation Command Request Bits are cleared by the PLC. Monitor value Set value 6. The EJ1 clears the Operation Command Response Bits. 144 Programless Communications · Multi Operation Commands Section 5-1 Initially accepts the operation command set in the operation command code, then accepts operation commands each time the operation command code changes. 2. The Operation Command Response Bits are set by the PLC. PLC Upload Area Address m+0 m+1 m+2 m+3 m+4 Memory Read Response Bits Setting Change Response Bits 0002 Communications Status EJ1 Download Area Address n+0 n+1 n+2 n+3 n+4 Memory Read Request Bits Setting Change Request Bits 0002 ZZZZ HFU TC4/2 ZZZZ ZZZZ Monitor value Set value 1. The EJ1 sets the Operation Command Request Bits. 3. The EJ1 repeatedly reads the operation command code. 145 Programless Communications Section 5-1 · Single operation instruction (bit specification) V1. 2 Executes the bit specification operation commands a single time from among the parameters set in the Download Area Setting. 4. The EJ1 sets the Operation Command Response Bits. PLC Upload Area Address m+0 m+1 m+2 m+3 m+4 Memory Read Response Bits Setting Change Response Bits 0003 Communications Status EJ1 Download Area Address n+0 n+1 n+2 n+3 n+4 ··· Memory Read Request Bits Setting Change Request Bits 0003 Operation Command Code zzzz HFU TC4/2 2. The Operation Command Request Bits are set by the PLC. Executes the operation instruction. Monitor value zzzz 1. Changes the bit specification parameter on the PLC side. 3. The EJ1 reads the bit specification parameter. PLC Upload Area Address m+0 m+1 m+2 m+3 m+4 Memory Read Response Bits Setting Change Response Bits 0000 Communications Status Download Area Address n+0 n+1 n+2 n+3 n+4 Memory Read Request Bits Setting Change Request Bits 0000 Operation Command Code zzzz 5. The Operation Command Request Bits are cleared by the PLC. Monitor value 6. [. . . ] Page numbers refer to the previous version. Revision code 01 02 02A 02B Date February 2006 February 2007 March 2007 March 2007 Revised content Original production Revised for addition of version 1. 1 EJ1 Temperature Controllers and version 2 G3ZA Power Controllers. Internal block diagram for TC4 corrected and parameter tables revised (Modbus addresses added and mistakes corrected). Corrections made, including the following. Page 118: Changed the data register value from D1000 to D1001 for the Setting Change Request Bits in Monitoring EJ1 Set Values. [. . . ]