By S. Foster Damon
William Blake, poet, artist, and mystic, created an enormous multidimensional universe via his verse and paintings. Spun from a material of symbolism and populated by way of a number of complicated characters, Blake's finished international has supplied never-ending thought to next generations. For the reader of Blake, historical past wisdom of his symbolism is a need. during this quantity, first released in 1965, S. Foster Damon, father of contemporary Blake reviews and a professor at Brown college until eventually his loss of life, has assembled all references to specific symbols or facets of Blake's paintings and existence, in order that readers can see the complete spectrum of Blake's concept on numerous themes.
For this variation of S. Foster Damon's vintage reference paintings, Morris Eaves has written an up to date annotated bibliography and a brand new foreword, integrated right here together with his unique 1988 index.
Read Online or Download A Blake Dictionary: The Ideas and Symbols of William Blake PDF
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Additional info for A Blake Dictionary: The Ideas and Symbols of William Blake
If the controller is a 984, these bits are the status of coils 8 through 1. If the controller is a 484, these bits are the status of coils 264 through 257. In this example, coil 257 is ON, indicating that the controller’s batteries are OK. PI–MBUS–300 Data and Control Functions 37 11 (0B Hex) Fetch Comm Event Counter Description Returns a status word and an event count from the slave’s communications event counter. By fetching the current count before and after a series of messages, a master can determine whether the messages were handled normally by the slave.
The table is as follows: 11, 12 Maximum quantity of output coils 13, 14 Output coil enable table 15, 16 Address of input coil/run table 17, 18 Quantity of input coils 19, 20 Input coil enable table 21, 22 First latch number (must be multiple of 16) 23, 24 Last latch number (must be multiple of 16) 50 Data and Control Functions PI–MBUS–300 25, 26 Address of input registers 27, 28 Quantity of input registers 29, 30 Quantity of output and holding registers 31, 32 Address of user logic 33, 34 Address of output coil RAM table 35, 36 Function inhibit mask 37, 38 Address of extended function routine 39, 40 Address of data transfer routine 41, 42 Address of traffic cop 43, 44 Unused 45, 46 Function inhibit mask 47, 48 Address of ‘A’ Mode history table 49, 50 Request table for DX printer 51, 52 Quantity of sequence groups 53, 54 Address of sequence image table 55, 56 Address of sequence RAM 57, 58 Quantity of 50XX registers 59, 60 Address of 50XX table 61, 62 Address of output coil RAM image 63, 64 Address of input RAM image 65, 66 Delayed output start group 67, 68 Delayed output end group 69, 70 Watchdog line 71, 72 RAM Address of latches 73, 74 Quantity of delayed output groups PI–MBUS–300 Data and Control Functions 51 17 (11 Hex) Report Slave ID (Continued) 584 The 584 controller returns a byte count of 9, as follows: Byte Contents 1 Slave ID (3 for 584) 2 RUN indicator status (0 = OFF, FF = ON) 3 Quantity of 4K sections of page 0 memory 4 Quantity of 1K sections of state RAM 5 Quantity of segments of user logic 6, 7 Machine state word (configuration table word 101, 65 hex).
Other coils can be programmed by the user to hold information about the contoller’s status, for example, ‘machine ON/OFF’, ‘heads retracted’, ‘safeties satisfied’, ‘error conditions exist’, or other user–defined flags. Broadcast is not supported. The function provides a simple method for accessing this information, because the Exception Coil references are known (no coil reference is needed in the function). The predefined Exception Coil assignments are: Controller Model Coil Assignment M84, 184/384, 584, 984 1–8 User defined 484 257 258 – 264 Battery Status User defined 884 761 762 763 764–768 Battery Status Memory Protect Status RIO Health Status User defined Query Here is an example of a request to read the exception status in slave device 17: QUERY Field Name Example (Hex) Slave Address Function Error Check (LRC or CRC) 11 07 –– Figure 22 Read Exception Status – Query 36 Data and Control Functions PI–MBUS–300 Response The normal response contains the status of the eight Exception Status coils.